Submitted URL: http://preview.duolingo.com/
Effective URL: https://preview.duolingo.com/
Submission: On April 25 via api from US — Scanned from DE

Summary

This website contacted 12 IPs in 3 countries across 8 domains to perform 95 HTTP transactions. The main IP is 35.153.109.124, located in Ashburn, United States and belongs to AMAZON-AES, US. The main domain is preview.duolingo.com.
TLS certificate: Issued by Go Daddy Secure Certificate Authority... on November 21st 2023. Valid for: a year.
This is the only time preview.duolingo.com was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
4 35.153.109.124 14618 (AMAZON-AES)
6 2606:4700::68... 13335 (CLOUDFLAR...)
2 2a00:1450:400... 15169 (GOOGLE)
61 2600:9000:21f... 16509 (AMAZON-02)
1 2a00:1450:400... 15169 (GOOGLE)
1 2606:4700:440... 13335 (CLOUDFLAR...)
1 2a00:1450:400... 15169 (GOOGLE)
2 2a00:1450:400... 15169 (GOOGLE)
1 13.249.9.22 16509 (AMAZON-02)
1 13.224.189.4 16509 (AMAZON-02)
15 3.216.65.200 14618 (AMAZON-AES)
95 12
Apex Domain
Subdomains
Transfer
61 cloudfront.net
d35aaqx5ub95lt.cloudfront.net
2 MB
21 duolingo.com
preview.duolingo.com
brb.duolingo.com — Cisco Umbrella Rank: 8388
zombie.duolingo.com — Cisco Umbrella Rank: 7853
excess.duolingo.com — Cisco Umbrella Rank: 7186
14 KB
6 cookielaw.org
cdn.cookielaw.org — Cisco Umbrella Rank: 306
148 KB
2 google.com
accounts.google.com — Cisco Umbrella Rank: 20
85 KB
2 recaptcha.net
www.recaptcha.net — Cisco Umbrella Rank: 1268
1 KB
1 googletagmanager.com
www.googletagmanager.com — Cisco Umbrella Rank: 39
104 KB
1 onetrust.com
geolocation.onetrust.com — Cisco Umbrella Rank: 535
304 B
1 gstatic.com
www.gstatic.com
203 KB
95 8
Domain Requested by
61 d35aaqx5ub95lt.cloudfront.net preview.duolingo.com
d35aaqx5ub95lt.cloudfront.net
15 excess.duolingo.com d35aaqx5ub95lt.cloudfront.net
6 cdn.cookielaw.org preview.duolingo.com
cdn.cookielaw.org
d35aaqx5ub95lt.cloudfront.net
4 preview.duolingo.com d35aaqx5ub95lt.cloudfront.net
2 accounts.google.com d35aaqx5ub95lt.cloudfront.net
accounts.google.com
2 www.recaptcha.net preview.duolingo.com
www.gstatic.com
1 zombie.duolingo.com d35aaqx5ub95lt.cloudfront.net
1 brb.duolingo.com d35aaqx5ub95lt.cloudfront.net
1 www.googletagmanager.com d35aaqx5ub95lt.cloudfront.net
1 geolocation.onetrust.com cdn.cookielaw.org
1 www.gstatic.com www.recaptcha.net
95 11
Subject Issuer Validity Valid
*.duolingo.com
Go Daddy Secure Certificate Authority - G2
2023-11-21 -
2024-12-22
a year crt.sh
cookielaw.org
Cloudflare Inc ECC CA-3
2024-03-01 -
2024-12-31
10 months crt.sh
misc.google.com
GTS CA 1C3
2024-04-08 -
2024-07-01
3 months crt.sh
*.cloudfront.net
Amazon RSA 2048 M01
2023-10-10 -
2024-09-19
a year crt.sh
*.gstatic.com
GTS CA 1C3
2024-04-08 -
2024-07-01
3 months crt.sh
onetrust.com
Cloudflare Inc ECC CA-3
2023-11-13 -
2024-11-12
a year crt.sh
*.google-analytics.com
GTS CA 1C3
2024-04-08 -
2024-07-01
3 months crt.sh
accounts.google.com
GTS CA 1C3
2024-04-08 -
2024-07-01
3 months crt.sh

This page contains 2 frames:

Primary Page: https://preview.duolingo.com/
Frame ID: 338224C27150255721E0C8FDC2A4CE5B
Requests: 88 HTTP requests in this frame

Frame: https://www.recaptcha.net/recaptcha/enterprise/anchor?ar=1&k=6LcLOdsjAAAAAFfwGusLLnnn492SOGhsCh-uEAvI&co=aHR0cHM6Ly9wcmV2aWV3LmR1b2xpbmdvLmNvbTo0NDM.&hl=de&v=V6_85qpc2Xf2sbe3xTnRte7m&size=invisible&cb=gv4ev5638uyy
Frame ID: 6206AB81F431D93BE78C5AABDE39889F
Requests: 1 HTTP requests in this frame

Screenshot

Page Title

Duolingo - Die weltbeste Methode, eine Sprache zu lernen

Page URL History Show full URLs

  1. http://preview.duolingo.com/ HTTP 307
    https://preview.duolingo.com/ Page URL

Detected technologies

Overall confidence: 100%
Detected patterns
  • accounts\.google\.com/gsi/client

Overall confidence: 100%
Detected patterns
  • <[^>]+data-react

Overall confidence: 100%
Detected patterns
  • googletagmanager\.com/gtm\.js

Overall confidence: 100%
Detected patterns
  • cdn\.cookielaw\.org
  • otSDKStub\.js

Page Statistics

95
Requests

100 %
HTTPS

64 %
IPv6

8
Domains

11
Subdomains

12
IPs

3
Countries

2628 kB
Transfer

12156 kB
Size

11
Cookies

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

  1. http://preview.duolingo.com/ HTTP 307
    https://preview.duolingo.com/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

95 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
preview.duolingo.com/
Redirect Chain
  • http://preview.duolingo.com/
  • https://preview.duolingo.com/
10 KB
4 KB
Document
General
Full URL
https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
35.153.109.124 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-35-153-109-124.compute-1.amazonaws.com
Software
duo-api /
Resource Hash
7dfaa2297fb9897de4af70120e6fe1c686e0b7e742a419ed28eb031d67e35189
Security Headers
Name Value
X-Frame-Options SAMEORIGIN

Request headers

Accept-Language
de-DE,de;q=0.9;q=0.9
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Response headers

cache-control
no-store, no-cache, must-revalidate, proxy-revalidate
content-encoding
gzip
content-type
text/html; charset=UTF-8
date
Thu, 25 Apr 2024 18:08:07 GMT
expires
0
no-retry
1
pragma
no-cache
server
duo-api
surrogate-control
no-store
x-duo-request-host
www.duolingo.com
x-envoy-upstream-service-time
57
x-frame-options
SAMEORIGIN
x-runtime
0.05011
x-tid
ffff31b3662a9b430458
x-ws
UK

Redirect headers

Location
https://preview.duolingo.com/
Non-Authoritative-Reason
HttpsUpgrades
otSDKStub.js
cdn.cookielaw.org/scripttemplates/
21 KB
7 KB
Script
General
Full URL
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6813:b134 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
6f08699117c1f15f6d35e7b4380d12d18a1881f075e177b5853b1017a3307544
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

x-ms-blob-type
BlockBlob
date
Thu, 25 Apr 2024 18:08:07 GMT
content-encoding
gzip
x-content-type-options
nosniff
cf-cache-status
HIT
content-md5
zgTRIDojRJmnmBTwUyI2Vw==
age
11
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-length
6882
x-ms-lease-status
unlocked
last-modified
Wed, 24 Apr 2024 02:34:14 GMT
server
cloudflare
etag
0x8DC64070814D9A8
vary
Accept-Encoding
content-type
application/javascript
access-control-allow-origin
*
x-ms-request-id
91415424-301e-0069-1b61-9600cf000000
access-control-expose-headers
x-ms-request-id,Server,x-ms-version,Content-Type,Content-Encoding,Last-Modified,ETag,Content-MD5,x-ms-lease-status,x-ms-blob-type,Content-Length,Date,Transfer-Encoding
cache-control
public, max-age=86400
x-ms-version
2009-09-19
accept-ranges
bytes
cf-ray
87a046d04fa335f1-FRA
expires
Fri, 26 Apr 2024 18:08:07 GMT
enterprise.js
www.recaptcha.net/recaptcha/
2 KB
1 KB
Script
General
Full URL
https://www.recaptcha.net/recaptcha/enterprise.js?render=6LcLOdsjAAAAAFfwGusLLnnn492SOGhsCh-uEAvI
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:808::2003 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
GSE /
Resource Hash
d2f856c5d16dd7568a07ed2a92af524f8f8591f192dbdcd1a127b93a6cad9aa4
Security Headers
Name Value
Content-Security-Policy frame-ancestors 'self'
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 18:08:07 GMT
content-encoding
gzip
x-content-type-options
nosniff
content-security-policy
frame-ancestors 'self'
server
GSE
x-frame-options
SAMEORIGIN
content-type
text/javascript; charset=utf-8
cache-control
private, max-age=300
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
x-xss-protection
1; mode=block
expires
Thu, 25 Apr 2024 18:08:07 GMT
manifest-ba67cec1.js
d35aaqx5ub95lt.cloudfront.net/js/
12 KB
6 KB
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/manifest-ba67cec1.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
33c7bcc670a8e91aea04e919e98ad3158078a2a72be667eb1905ed8e2acde90b

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 16:56:46 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Thu, 25 Apr 2024 16:28:32 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
4282
etag
"a0c80ef7d8ccb92af718f9c6743c1793"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
6000
x-amz-cf-id
0T00D04pI65WnUtHUFaBKUFshRTsuONaWRnJDVpYl17hkrNywtYQAA==
features-bf447053.js
d35aaqx5ub95lt.cloudfront.net/js/
3 KB
2 KB
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/features-bf447053.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
f41c7f8db4a21ca69ba3c99f9024163b38bf733fc30f348b2b5f24026074cf3a

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 11 Apr 2024 19:58:01 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Thu, 11 Apr 2024 19:50:35 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
1203007
etag
"744ca22e944d0ede859a1ffec730574f"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
1158
x-amz-cf-id
nCjt2pHEkBlIMV6_HtDopSDMTPloVMaYd5FmnqEavzJN59IvxyF1XA==
8553-a0eeda7a.js
d35aaqx5ub95lt.cloudfront.net/js/
24 KB
9 KB
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/8553-a0eeda7a.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
9179ef7271b73ff2bda6115717edd59c35b5516a59e75a84b80210f05657cdec

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Wed, 24 Apr 2024 20:27:43 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Wed, 24 Apr 2024 20:08:32 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
78025
etag
"01a4ed918c451d99036d128d3df70027"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
9286
x-amz-cf-id
eTnwR29cUkWzLV3PJBQJGH1_te-13FXaBL95-h09IUvBcV8uTrpZtw==
polyfills-d1e2cb95.js
d35aaqx5ub95lt.cloudfront.net/js/
371 B
628 B
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/polyfills-d1e2cb95.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
cfff8569bb27bee3dcbccaba435f5f8eb724b8052d64ab2d89c5c31f172813c8

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 04 Jan 2024 02:24:59 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Wed, 03 Jan 2024 23:37:20 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
9733389
etag
"68f9e1c58cf5415d5cd04b41da7beef2"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
233
x-amz-cf-id
QA4zWmfuhJNxsdM8bYJqISoprRBYX0S_tyaNgB28eeWwP9JNcpnKng==
2867-ab915ca1.js
d35aaqx5ub95lt.cloudfront.net/js/
330 KB
108 KB
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/2867-ab915ca1.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
c4ccf1766f61bb75f0c84215a2c7eac808e878a72a34b5ee3ad3a15260ca433e

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Wed, 24 Apr 2024 21:26:06 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Wed, 24 Apr 2024 21:12:13 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
74522
etag
"688434b7801ac86689a439020ca0dcc1"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
109868
x-amz-cf-id
4D_dS07ZiQTCX2y_3jN6O1loDMYTyNTDqf5-HiiCmFYpBZXkRz776g==
de-9b0adbaf.js
d35aaqx5ub95lt.cloudfront.net/js/strings/
26 KB
5 KB
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/strings/de-9b0adbaf.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
bd818b2b8da03f7dcec5fd60cb15ed9024adf2d14d8e0c1d14c602e7974dd40e

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Mon, 15 Jan 2024 07:26:28 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Fri, 12 Jan 2024 22:23:56 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
8764900
etag
"6d3be3fc3e017f365aeed72e0f5d2592"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
4553
x-amz-cf-id
wPcB3MrKZ_mfUc34OtKE8VS5QTHswJ2aQ95nUKoKUbXdCzuHc84_-A==
5288-7e67a985.js
d35aaqx5ub95lt.cloudfront.net/js/
702 KB
224 KB
Script
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
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sec-ch-ua
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
via
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FRA2-C2
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cache-control
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Request headers

sec-ch-ua
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
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FRA2-C2
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74523
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cache-control
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Protocol
H2
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Request headers

sec-ch-ua
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sec-ch-ua-mobile
?0
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
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74523
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x-amz-server-side-encryption
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cache-control
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accept-ranges
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Protocol
H2
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TLS 1.3, , AES_128_GCM
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2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
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Request headers

sec-ch-ua
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Accept-Language
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sec-ch-ua-mobile
?0
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
via
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last-modified
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server
AmazonS3
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FRA2-C2
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74523
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cache-control
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Request headers

sec-ch-ua
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

x-ms-blob-type
BlockBlob
date
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content-encoding
gzip
x-content-type-options
nosniff
cf-cache-status
HIT
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H2
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TLS 1.3, , AES_128_GCM
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2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
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sec-ch-ua
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

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content-encoding
gzip
via
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x-amz-cf-pop
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server
AmazonS3
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H2
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TLS 1.3, , AES_128_GCM
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Request headers

sec-ch-ua
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sec-ch-ua-mobile
?0
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
via
1.1 a32f966fc5896281eb3de44fd8f57d40.cloudfront.net (CloudFront)
x-amz-cf-pop
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server
AmazonS3
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Request headers

Referer
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User-Agent
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Response headers

Content-Type
text/javascript
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509 KB
203 KB
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Full URL
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Protocol
H2
Security
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Security Headers
Name Value
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Request headers

sec-ch-ua
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Referer
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
x-content-type-options
nosniff
age
11350
content-security-policy-report-only
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cross-origin
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H2
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Name Value
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Request headers

sec-ch-ua
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accept
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

date
Thu, 25 Apr 2024 18:08:07 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-encoding
gzip
server
cloudflare
vary
Accept-Encoding
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access-control-allow-origin
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cf-ray
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access-control-allow-headers
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sec-ch-ua
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
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last-modified
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server
AmazonS3
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cache-control
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Request headers

sec-ch-ua
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sec-ch-ua-mobile
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sec-ch-ua-platform
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Response headers

date
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content-encoding
gzip
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x-cache
Hit from cloudfront
content-type
application/javascript
cache-control
max-age=315360000
accept-ranges
bytes
content-length
9414
x-amz-cf-id
yFnZ_pXeSmsbLrG0YO385o3FpDQ9vUwnJABM4UGYF95LX3ieUhCTTQ==
client
accounts.google.com/gsi/
219 KB
84 KB
Script
General
Full URL
https://accounts.google.com/gsi/client
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/app-d5c63662.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:400c:c09::54 Brussels, Belgium, ASN15169 (GOOGLE, US),
Reverse DNS
Software
ESF /
Resource Hash
2863b53100502115a472b9f9a5c4f9c65948b904eb7e66d17401076feafa6373
Security Headers
Name Value
Content-Security-Policy script-src 'report-sample' 'nonce-6Kh6-qKyHRPamLJHJehRiQ' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval';object-src 'none';base-uri 'self';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http, require-trusted-types-for 'script';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
content-security-policy
script-src 'report-sample' 'nonce-6Kh6-qKyHRPamLJHJehRiQ' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval';object-src 'none';base-uri 'self';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http, require-trusted-types-for 'script';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http
content-encoding
gzip
x-content-type-options
nosniff
server
ESF
x-frame-options
SAMEORIGIN
report-to
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content-type
application/javascript; charset=utf-8
cache-control
private, max-age=1800
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
x-xss-protection
0
cross-origin-opener-policy-report-only
same-origin; report-to="coop_dd7de8473bddc59c6b748810a67a39b1"
expires
Thu, 25 Apr 2024 18:08:08 GMT
web.json
brb.duolingo.com/0/
345 B
770 B
Fetch
General
Full URL
https://brb.duolingo.com/0/web.json?user=0&ts=1714068488&tzoffset=2
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
13.249.9.22 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
server-13-249-9-22.cdg53.r.cloudfront.net
Software
AmazonS3 /
Resource Hash
1cf6a603aac88ae6ae6e56f2c76811f804e7cd591c94555f0f7aa5436aeb99d4

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Accept
application/json; charset=UTF-8
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 18:08:07 GMT
via
1.1 45dddc65ba3da4a1716d9c10f4aaaa08.cloudfront.net (CloudFront)
server
AmazonS3
x-amz-cf-pop
CDG53-C1
access-control-max-age
3000
access-control-allow-methods
GET, HEAD
content-type
text/html; charset=utf-8
access-control-allow-origin
https://preview.duolingo.com
x-cache
Error from cloudfront
vary
Origin,Access-Control-Request-Headers,Access-Control-Request-Method
access-control-allow-credentials
true
content-length
345
x-amz-cf-id
5TVHqEcboIz6spocEo31UfIu13NpxqSuUX9Oyv7y7v7pPiiJm6tnrw==
web.json
zombie.duolingo.com/0/
345 B
770 B
Fetch
General
Full URL
https://zombie.duolingo.com/0/web.json?user=0&ts=1714068488&tzoffset=2
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
13.224.189.4 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
server-13-224-189-4.fra2.r.cloudfront.net
Software
AmazonS3 /
Resource Hash
6b2db35f41d06978150a4ff23a2c6f822bc0cfb73c111592037622241e2ec2ae

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Accept
application/json; charset=UTF-8
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 18:08:07 GMT
via
1.1 eb83e7e264681d87a86c9b6a2159e502.cloudfront.net (CloudFront)
server
AmazonS3
x-amz-cf-pop
FRA2-C1
access-control-max-age
3000
access-control-allow-methods
GET, HEAD
content-type
text/html; charset=utf-8
access-control-allow-origin
https://preview.duolingo.com
x-cache
Error from cloudfront
vary
Origin,Access-Control-Request-Headers,Access-Control-Request-Method
access-control-allow-credentials
true
content-length
345
x-amz-cf-id
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tracking-status
preview.duolingo.com/2017-06-30/
2 B
1 KB
Fetch
General
Full URL
https://preview.duolingo.com/2017-06-30/tracking-status
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
35.153.109.124 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-35-153-109-124.compute-1.amazonaws.com
Software
duo-api /
Resource Hash
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Security Headers
Name Value
X-Frame-Options SAMEORIGIN

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
X-Amzn-Trace-Id
User=0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-Type
application/json; charset=UTF-8
Accept
application/json; charset=UTF-8
Referer
https://preview.duolingo.com/
X-Requested-With
XMLHttpRequest
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
x-ws
UK
x-tid
ffff2f2b662a96e306b5
surrogate-control
no-store
x-duo-request-host
www.duolingo.com
x-envoy-upstream-service-time
22
content-length
2
pragma
no-cache
x-runtime
0.01954
server
duo-api
no-retry
1
access-control-max-age
1728000
access-control-allow-methods
GET, POST, OPTIONS, PATCH, PUT, DELETE
content-type
application/json; charset=UTF-8
access-control-allow-origin
https://preview.duolingo.com
access-control-expose-headers
Cache-Control, Content-Length, Content-Type, Expires, No-Retry, Pragma, Surrogate-Control
cache-control
no-store, no-cache, must-revalidate, proxy-revalidate
access-control-allow-credentials
true
x-frame-options
SAMEORIGIN
access-control-allow-headers
, accept, accept-encoding, accept-language, authorization, cache-control, connection, content-type, dnt, host, if-modified-since, keep-alive, user-agent, x-requested-with
expires
0
config
preview.duolingo.com/2017-06-30/
3 KB
1 KB
Fetch
General
Full URL
https://preview.duolingo.com/2017-06-30/config?fields=ageRestrictionLimit,clientExperiments%7Bsfeat_web_clientside_experiment_test_fam,sfeat_web_clientside_experiment_test_fam_v2%7D,featureFlags,ipCountry,speechHost&_=1714068488052
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
35.153.109.124 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-35-153-109-124.compute-1.amazonaws.com
Software
duo-api /
Resource Hash
578d245be7804bf36202a6ec52166b72a1979a5763437512d9804da091a3d11c
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Frame-Options DENY
X-Xss-Protection 1 ; mode=block

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
X-Amzn-Trace-Id
User=0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Accept
application/json; charset=UTF-8
Referer
https://preview.duolingo.com/
X-Requested-With
XMLHttpRequest
sec-ch-ua-platform
"Win32"

Response headers

pragma
no-cache
date
Thu, 25 Apr 2024 18:08:08 GMT
content-encoding
br
x-content-type-options
nosniff
referrer-policy
no-referrer
server
duo-api
vary
Origin,Access-Control-Request-Method,Access-Control-Request-Headers
x-frame-options
DENY
content-type
application/json
x-duo-request-host
www.duolingo.com
cache-control
no-cache, no-store, max-age=0, must-revalidate
x-envoy-upstream-service-time
14
content-length
990
x-xss-protection
1 ; mode=block
expires
0
batch
excess.duolingo.com/
34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash
26503ab2f8fd7184b8f272f63557e8d0b61c9d3cb6ee042e37a4e541dc2eb615

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-type
application/json

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
text/plain;charset=iso-8859-1
access-control-allow-origin
*
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
content-length
34
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173 KB
39 KB
Image
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/vendor/87938207afff1598611ba626a8c4827c.svg
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Tue, 23 Jan 2024 06:02:20 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Tue, 23 Jan 2024 02:51:08 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
8078749
etag
"0ec579405fb93a7ea3455bae76261d4d"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
max-age=315360000
accept-ranges
bytes
content-length
39497
x-amz-cf-id
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3 KB
Image
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/images/splash/f92d5f2f7d56636846861c458c0d0b6c.svg
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Sun, 31 Dec 2023 22:04:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Fri, 29 Dec 2023 21:22:51 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
10008245
etag
"84b45c5c36387faf2f52703121a33caa"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
max-age=315360000
accept-ranges
bytes
content-length
2513
x-amz-cf-id
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323 KB
40 KB
Image
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/images/splash/lottie/23ab11cb1e1a9aff54facdf57833373d.svg
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Wed, 17 Jan 2024 15:14:54 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Tue, 16 Jan 2024 22:30:45 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
8563995
etag
"b35fad34fc76ea205566e63be4785a26"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
max-age=315360000
accept-ranges
bytes
content-length
40886
x-amz-cf-id
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d35aaqx5ub95lt.cloudfront.net/images/splash/lottie/
432 KB
40 KB
Image
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/images/splash/lottie/08ec8d0260c55c054e1b97bcbc96ea0f.svg
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
f604cfdff29ce793536537e6749264f3f836820167e522db04b29f5953ae439a

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Sun, 31 Dec 2023 22:04:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Fri, 29 Dec 2023 21:22:51 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
10008245
etag
"b3328eb7b424cd78e678d8c0a1717178"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
max-age=315360000
accept-ranges
bytes
content-length
40500
x-amz-cf-id
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d35aaqx5ub95lt.cloudfront.net/images/splash/lottie/
565 KB
122 KB
Image
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/images/splash/lottie/833a22b2834050d139f266a29899bb00.svg
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Wed, 11 Oct 2023 20:18:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Wed, 11 Oct 2023 19:37:56 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
17013005
etag
"c79222ff5a59f806b52f54bd8fc1324b"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
max-age=315360000
accept-ranges
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Image
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Full URL
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
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Request headers

sec-ch-ua
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Referer
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Accept-Language
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sec-ch-ua-mobile
?0
User-Agent
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sec-ch-ua-platform
"Win32"

Response headers

date
Sun, 31 Dec 2023 22:04:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Fri, 29 Dec 2023 21:22:51 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
10008245
etag
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x-amz-server-side-encryption
AES256
x-cache
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content-type
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cache-control
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accept-ranges
bytes
content-length
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Full URL
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
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Request headers

sec-ch-ua
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Referer
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Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
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sec-ch-ua-platform
"Win32"

Response headers

date
Wed, 11 Oct 2023 20:18:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
17013005
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x-amz-server-side-encryption
AES256
x-cache
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content-type
image/svg+xml
cache-control
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accept-ranges
bytes
content-length
12272
x-amz-cf-id
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Full URL
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
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sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 23 Nov 2023 00:07:32 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
13370437
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x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
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bytes
content-length
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
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Request headers

sec-ch-ua
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Referer
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Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
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sec-ch-ua-platform
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Response headers

date
Sat, 13 Jan 2024 01:31:33 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
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FRA2-C2
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x-amz-server-side-encryption
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content-type
image/svg+xml
cache-control
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content-length
15029
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Full URL
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
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Response headers

date
Sun, 31 Dec 2023 22:04:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
10008245
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x-amz-server-side-encryption
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x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
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accept-ranges
bytes
content-length
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Full URL
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
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Response headers

date
Mon, 25 Dec 2023 14:10:24 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
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age
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Hit from cloudfront
content-type
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cache-control
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
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Response headers

date
Wed, 11 Oct 2023 20:18:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
17013005
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x-amz-server-side-encryption
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content-type
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cache-control
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accept-ranges
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content-length
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Full URL
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Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
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Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
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Response headers

date
Wed, 11 Oct 2023 20:18:04 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
17013005
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x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
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accept-ranges
bytes
content-length
20489
x-amz-cf-id
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17 KB
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General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/images/splash/lottie/890eb76de9a395b182c1c28322721405.svg
Requested by
Host: preview.duolingo.com
URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 11 Jan 2024 11:21:22 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Thu, 11 Jan 2024 08:32:13 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
9096406
etag
"5695a666ebdb86ba80514d6434b534cf"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/svg+xml
cache-control
max-age=315360000
accept-ranges
bytes
content-length
16956
x-amz-cf-id
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batch
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34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
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Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-type
application/json

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
text/plain;charset=iso-8859-1
access-control-allow-origin
*
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
content-length
34
batch
excess.duolingo.com/
34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-type
application/json

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
text/plain;charset=iso-8859-1
access-control-allow-origin
*
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
content-length
34
batch
excess.duolingo.com/
34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash
26503ab2f8fd7184b8f272f63557e8d0b61c9d3cb6ee042e37a4e541dc2eb615

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-type
application/json

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
text/plain;charset=iso-8859-1
access-control-allow-origin
*
access-control-allow-headers
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content-length
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batch
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311 B
XHR
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Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
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Resource Hash
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Request headers

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sec-ch-ua-platform
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sec-ch-ua-mobile
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Content-type
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Response headers

date
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accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
text/plain;charset=iso-8859-1
access-control-allow-origin
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access-control-allow-headers
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content-length
34
batch
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34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
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ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
Accept-Language
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sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-type
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Response headers

date
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accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
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access-control-allow-origin
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content-length
34
batch
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34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
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Resource Hash
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
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sec-ch-ua-mobile
?0
User-Agent
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Content-type
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Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
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content-type
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access-control-allow-origin
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access-control-allow-headers
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Requested by
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URL: https://preview.duolingo.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
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Reverse DNS
Software
AmazonS3 /
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Request headers

sec-ch-ua
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Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
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Response headers

date
Wed, 03 Jan 2024 00:37:32 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
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server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
9826237
etag
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x-amz-server-side-encryption
AES256
x-cache
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content-type
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cache-control
max-age=315360000
accept-ranges
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content-length
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x-amz-cf-id
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excess.duolingo.com/ Frame
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Preflight
General
Full URL
https://excess.duolingo.com/batch
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H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash

Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
POST
Origin
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Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
gzip, identity
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
access-control-allow-methods
POST, GET, OPTIONS
access-control-allow-origin
*
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server
Jetty(9.4.53.v20231009)
batch
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Preflight
General
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H2
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Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
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Software
Jetty(9.4.53.v20231009) /
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Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
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Origin
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Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
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access-control-allow-headers
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access-control-allow-methods
POST, GET, OPTIONS
access-control-allow-origin
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batch
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Software
Jetty(9.4.53.v20231009) /
Resource Hash

Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
POST
Origin
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Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
gzip, identity
access-control-allow-headers
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access-control-allow-methods
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access-control-allow-origin
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server
Jetty(9.4.53.v20231009)
batch
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Reverse DNS
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Software
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Resource Hash

Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
POST
Origin
https://preview.duolingo.com
Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
gzip, identity
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
access-control-allow-methods
POST, GET, OPTIONS
access-control-allow-origin
*
access-control-max-age
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allow
GET, HEAD, POST, TRACE, OPTIONS
content-length
0
date
Thu, 25 Apr 2024 18:08:08 GMT
server
Jetty(9.4.53.v20231009)
batch
excess.duolingo.com/ Frame
0
0
Preflight
General
Full URL
https://excess.duolingo.com/batch
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H2
Security
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Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
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Software
Jetty(9.4.53.v20231009) /
Resource Hash

Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
POST
Origin
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Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
gzip, identity
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
access-control-allow-methods
POST, GET, OPTIONS
access-control-allow-origin
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Thu, 25 Apr 2024 18:08:08 GMT
server
Jetty(9.4.53.v20231009)
batch
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H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash

Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
POST
Origin
https://preview.duolingo.com
Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
gzip, identity
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
access-control-allow-methods
POST, GET, OPTIONS
access-control-allow-origin
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server
Jetty(9.4.53.v20231009)
batch
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Preflight
General
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H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash

Request headers

Accept
*/*
Access-Control-Request-Headers
content-type
Access-Control-Request-Method
POST
Origin
https://preview.duolingo.com
Sec-Fetch-Mode
cors
User-Agent
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Response headers

accept-encoding
gzip, identity
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
access-control-allow-methods
POST, GET, OPTIONS
access-control-allow-origin
*
access-control-max-age
3600
allow
GET, HEAD, POST, TRACE, OPTIONS
content-length
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date
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server
Jetty(9.4.53.v20231009)
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109 KB
Script
General
Full URL
https://cdn.cookielaw.org/scripttemplates/202404.1.0/otBannerSdk.js
Requested by
Host: cdn.cookielaw.org
URL: https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6813:b134 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

x-ms-blob-type
BlockBlob
date
Thu, 25 Apr 2024 18:08:08 GMT
content-encoding
gzip
x-content-type-options
nosniff
cf-cache-status
HIT
content-md5
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age
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strict-transport-security
max-age=31536000; includeSubDomains; preload
content-length
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x-ms-lease-status
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last-modified
Wed, 24 Apr 2024 02:34:12 GMT
server
cloudflare
etag
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vary
Accept-Encoding
content-type
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access-control-allow-origin
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x-ms-request-id
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access-control-expose-headers
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cache-control
max-age=86400
x-ms-version
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accept-ranges
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cf-ray
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anchor
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General
Full URL
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URL: https://www.gstatic.com/recaptcha/releases/V6_85qpc2Xf2sbe3xTnRte7m/recaptcha__de.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
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Reverse DNS
Software
GSE /
Resource Hash
Security Headers
Name Value
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X-Content-Type-Options nosniff
X-Xss-Protection 1; mode=block

Request headers

Accept-Language
de-DE,de;q=0.9;q=0.9
Referer
https://preview.duolingo.com/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-mobile
?0
sec-ch-ua-platform
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Response headers

alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cache-control
no-cache, no-store, max-age=0, must-revalidate
content-encoding
gzip
content-security-policy
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content-type
text/html; charset=utf-8
cross-origin-embedder-policy
require-corp
cross-origin-resource-policy
cross-origin
date
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expires
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pragma
no-cache
report-to
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server
GSE
x-content-type-options
nosniff
x-xss-protection
1; mode=block
de.json
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86 KB
22 KB
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General
Full URL
https://cdn.cookielaw.org/consent/55a7f100-001e-4085-87ec-1a6d522f7d67/e43d2735-b44f-43da-ae8a-a4f881b04152/de.json
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6813:b134 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
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Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
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sec-ch-ua-mobile
?0
User-Agent
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sec-ch-ua-platform
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Response headers

x-ms-blob-type
BlockBlob
date
Thu, 25 Apr 2024 18:08:08 GMT
content-encoding
gzip
x-content-type-options
nosniff
cf-cache-status
MISS
strict-transport-security
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content-md5
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content-length
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x-ms-lease-status
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last-modified
Thu, 25 Apr 2024 15:36:13 GMT
server
cloudflare
etag
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vary
Accept-Encoding
content-type
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access-control-allow-origin
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access-control-expose-headers
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cache-control
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x-ms-version
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accept-ranges
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expires
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otFlat.json
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13 KB
3 KB
Fetch
General
Full URL
https://cdn.cookielaw.org/scripttemplates/202404.1.0/assets/otFlat.json
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6813:b134 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
f4aaa18c55c90588c5e828e56dcc6b2cb0acf9a4280494c7d1a53fc5e3669112
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

x-ms-blob-type
BlockBlob
date
Thu, 25 Apr 2024 18:08:08 GMT
content-encoding
gzip
x-content-type-options
nosniff
cf-cache-status
HIT
content-md5
b+pTLIKqE+1qZQNXM//GQg==
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-length
3041
x-ms-lease-status
unlocked
last-modified
Thu, 25 Apr 2024 02:28:56 GMT
server
cloudflare
etag
0x8DC64CF7527DF5E
vary
Accept-Encoding
content-type
application/json
access-control-allow-origin
*
x-ms-request-id
119e459d-901e-0012-7327-974253000000
access-control-expose-headers
x-ms-request-id,Server,x-ms-version,Content-Type,Content-Encoding,Last-Modified,ETag,Content-MD5,x-ms-lease-status,x-ms-blob-type,Content-Length,Date,Transfer-Encoding
cache-control
max-age=86400
x-ms-version
2009-09-19
accept-ranges
bytes
cf-ray
87a046d778be363e-FRA
otCommonStyles.css
cdn.cookielaw.org/scripttemplates/202404.1.0/assets/
24 KB
4 KB
Fetch
General
Full URL
https://cdn.cookielaw.org/scripttemplates/202404.1.0/assets/otCommonStyles.css
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6813:b134 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
06c0edbfc1b871fb45195265f5faad3e23191305f6ff2125557a9fbc287c8992
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

x-ms-blob-type
BlockBlob
date
Thu, 25 Apr 2024 18:08:08 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
content-encoding
gzip
content-md5
4ErYmXXFNbMLrnc9DrDTsg==
age
6125
x-ms-lease-status
unlocked
last-modified
Thu, 25 Apr 2024 02:29:06 GMT
server
cloudflare
vary
Accept-Encoding
content-type
text/css
access-control-allow-origin
*
x-ms-request-id
f344ebda-001e-004d-2726-97f66f000000
access-control-expose-headers
x-ms-request-id,Server,x-ms-version,Content-Type,Last-Modified,ETag,Content-MD5,x-ms-lease-status,x-ms-blob-type,Content-Length,Date,Transfer-Encoding
cache-control
max-age=86400
x-ms-version
2009-09-19
cf-ray
87a046d778bf363e-FRA
style
accounts.google.com/gsi/
533 B
585 B
Stylesheet
General
Full URL
https://accounts.google.com/gsi/style
Requested by
Host: accounts.google.com
URL: https://accounts.google.com/gsi/client
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:400c:c09::54 Brussels, Belgium, ASN15169 (GOOGLE, US),
Reverse DNS
Software
ESF /
Resource Hash
1c4e7e389d73c6acf7f19cc812514e71230740791fde8a018c1d7edccf1590ae
Security Headers
Name Value
Content-Security-Policy script-src 'report-sample' 'nonce-CsI-VjGLs_bCwLTOF6ireQ' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval';object-src 'none';base-uri 'self';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http, require-trusted-types-for 'script';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 25 Apr 2024 18:08:08 GMT
content-security-policy
script-src 'report-sample' 'nonce-CsI-VjGLs_bCwLTOF6ireQ' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval';object-src 'none';base-uri 'self';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http, require-trusted-types-for 'script';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http
content-encoding
gzip
x-content-type-options
nosniff
server
ESF
x-frame-options
SAMEORIGIN
report-to
{"group":"coop_dd7de8473bddc59c6b748810a67a39b1","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/dd7de8473bddc59c6b748810a67a39b1"}]}
content-type
text/css; charset=utf-8
cache-control
private, max-age=86400
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
x-xss-protection
0
cross-origin-opener-policy-report-only
same-origin; report-to="coop_dd7de8473bddc59c6b748810a67a39b1"
expires
Thu, 25 Apr 2024 18:08:08 GMT
batch
excess.duolingo.com/
34 B
311 B
XHR
General
Full URL
https://excess.duolingo.com/batch
Requested by
Host: d35aaqx5ub95lt.cloudfront.net
URL: https://d35aaqx5ub95lt.cloudfront.net/js/5288-7e67a985.js
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
3.216.65.200 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-3-216-65-200.compute-1.amazonaws.com
Software
Jetty(9.4.53.v20231009) /
Resource Hash
26503ab2f8fd7184b8f272f63557e8d0b61c9d3cb6ee042e37a4e541dc2eb615

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform
"Win32"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-type
application/json

Response headers

date
Thu, 25 Apr 2024 18:08:09 GMT
accept-encoding
gzip, identity
server
Jetty(9.4.53.v20231009)
access-control-max-age
3600
access-control-allow-methods
POST, GET, OPTIONS
content-type
text/plain;charset=iso-8859-1
access-control-allow-origin
*
access-control-allow-headers
Content-Type, Access-Control-Allow-Headers, Authorization
content-length
34
favicon.ico
d35aaqx5ub95lt.cloudfront.net/
15 KB
4 KB
Other
General
Full URL
https://d35aaqx5ub95lt.cloudfront.net/favicon.ico
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:21f3:c600:7:60cd:e840:21 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
AmazonS3 /
Resource Hash
587ed3e3a94f04264f02bf6e21798c8ca32de7b7f22d30cfc667224741c4a3c2

Request headers

sec-ch-ua
"Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer
https://preview.duolingo.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Sun, 07 Jan 2024 11:46:57 GMT
content-encoding
gzip
via
1.1 e56e6732f380db727425bac2d6158760.cloudfront.net (CloudFront)
last-modified
Fri, 05 Jan 2024 20:56:28 GMT
server
AmazonS3
x-amz-cf-pop
FRA2-C2
age
9440472
etag
"80b0487df87a85d16882eb991ce89431"
x-amz-server-side-encryption
AES256
x-cache
Hit from cloudfront
content-type
image/vnd.microsoft.icon
cache-control
max-age=315360000
accept-ranges
bytes
content-length
3407
x-amz-cf-id
KWngMlIrlv9LEI90oflkJOtwOwV3knvZs3MN6xoAxIhPtzqGpAughg==

Verdicts & Comments Add Verdict or Comment

49 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

object| 0 object| 1 object| OneTrustStub function| OptanonWrapper object| duo object| webpackChunk boolean| supportsAbortController boolean| supportsElementAnimate boolean| supportsES2015 boolean| supportsEs2019 boolean| supportsIntersectionObserver boolean| supportsWebAssembly boolean| supportsResizeObserver object| features boolean| isAbc object| HIDE_APP_SMART_BANNER_PATH undefined| el object| ___grecaptcha_cfg object| grecaptcha string| __recaptcha_api boolean| __google_recaptcha_client function| _fs_ready object| dataLayer number| __NUMBER_OF_JOTAI_INSTANCES__ function| _ function| _rollbarURH function| ga object| gaDevIds object| gaplugins function| HowlerGlobal object| Howler function| Howl function| Sound object| __SENTRY__ function| onGoogleLibraryLoad string| OnetrustActiveGroups string| OptanonActiveGroups object| otStubData object| recaptcha object| closure_lm_323915 object| google_tag_manager object| google_tag_data object| default_gsi object| _F_toggles object| google object| closure_lm_200561 object| Optanon object| OneTrust object| __G_ID_CLIENT__

11 Cookies

Domain/Path Name / Value
.duolingo.com/ Name: logged_out_uuid
Value: a6e1b070-07b6-47d3-be74-4ec99dad93bb
.duolingo.com/ Name: lang
Value: de
preview.duolingo.com/ Name: wuuid
Value: 3521c8d0-c855-464c-a18f-cc1aeda741e2
.duolingo.com/ Name: tsl
Value: 1714068487991
.duolingo.com/ Name: lu
Value: https://preview.duolingo.com/
.duolingo.com/ Name: initial_referrer
Value: $direct
.duolingo.com/ Name: lr
Value:
.duolingo.com/ Name: lp
Value: splash
preview.duolingo.com/ Name: AWSALB
Value: TRV9dCwnN0Lwz7IW88DjAF5gBAGaruNHYKtEvDfJ/bPffQnAepc7bWb0s0MB0NVu1ECqcbP8Tm61t8iefTyyZwOdqI6zdvPYyOza5/0BM5R8zdRAGe5r2diJsU91
preview.duolingo.com/ Name: AWSALBCORS
Value: TRV9dCwnN0Lwz7IW88DjAF5gBAGaruNHYKtEvDfJ/bPffQnAepc7bWb0s0MB0NVu1ECqcbP8Tm61t8iefTyyZwOdqI6zdvPYyOza5/0BM5R8zdRAGe5r2diJsU91
.duolingo.com/ Name: OptanonConsent
Value: isGpcEnabled=0&datestamp=Thu+Apr+25+2024+20%3A08%3A08+GMT%2B0200+(Mitteleurop%C3%A4ische+Sommerzeit)&version=202404.1.0&browserGpcFlag=0&isIABGlobal=false&hosts=&consentId=2714fa50-80a2-4dae-b73d-0613a24227d7&interactionCount=0&isAnonUser=1&landingPath=https%3A%2F%2Fpreview.duolingo.com%2F&groups=C0001%3A1%2CC0002%3A0%2CC0003%3A0%2CC0004%3A0

2 Console Messages

Source Level URL
Text
network error URL: https://zombie.duolingo.com/0/web.json?user=0&ts=1714068488&tzoffset=2
Message:
Failed to load resource: the server responded with a status of 404 ()
network error URL: https://brb.duolingo.com/0/web.json?user=0&ts=1714068488&tzoffset=2
Message:
Failed to load resource: the server responded with a status of 404 ()

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header Value
X-Frame-Options SAMEORIGIN

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

accounts.google.com
brb.duolingo.com
cdn.cookielaw.org
d35aaqx5ub95lt.cloudfront.net
excess.duolingo.com
geolocation.onetrust.com
preview.duolingo.com
www.googletagmanager.com
www.gstatic.com
www.recaptcha.net
zombie.duolingo.com
13.224.189.4
13.249.9.22
2600:9000:21f3:c600:7:60cd:e840:21
2606:4700:4400::ac40:9b77
2606:4700::6813:b134
2a00:1450:4001:808::2003
2a00:1450:4001:81c::2003
2a00:1450:4001:82f::2008
2a00:1450:400c:c09::54
3.216.65.200
35.153.109.124
01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b
06c0edbfc1b871fb45195265f5faad3e23191305f6ff2125557a9fbc287c8992
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12d4b2a5a083b4ff431761d997150acba19d78288aedae00751a6109c81be7e3
1a211f4c6d49dbf217a5175116c408a197644fee8c05aaeed19ec5ffde8dc550
1c4e7e389d73c6acf7f19cc812514e71230740791fde8a018c1d7edccf1590ae
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33c7bcc670a8e91aea04e919e98ad3158078a2a72be667eb1905ed8e2acde90b
352a6d9b12a5ae3949d370ff42a338ba8bb6ff455d9ba995b1755fb7b99e8824
3e322f452fc0c41aec4a394c83d34b7cd97883f68bb8874fde246e131d10aee2
3ec711c11c61a4c53a79abd92cbad2311ceae2339e6d7b8bc615b077086c2610
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