www.ietf.org
104.16.45.99  Public Scan Open in urlscan Pro

Internal
urlscan.io (IP) urlscan.io (Domain)
Effective Hostname
VirusTotal SecurityTrails crt.sh
Submitted URL
Google Safe Browsing Archive.org
Effective URL Pivot
Google Safe Browsing Archive.org
Effective IP
VirusTotal SecurityTrails Domaintools Censys
Go To Rescan
Add Verdict Report
Submitted URL:
http://ietf.org/ 13yr old
Effective URL:
https://www.ietf.org/ 9yr old
Submission: On April 25 via api (April 25th 2026, 8:42:43 am UTC) from AT — Scanned from DE
Summary HTTP 19 Redirects Links 22  Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 2 IPs in 2 countries across 1 domains to perform 19 HTTP transactions. The main IP is 104.16.45.99, located in Ascension Island and belongs to CLOUDFLARENET - Cloudflare, Inc., US. The main domain is www.ietf.org. The Cisco Umbrella rank of the primary domain is 11644. 9yr old
TLS certificate: Issued by E8 on March 11th 2026. Valid for: 3mo.
This is the only time www.ietf.org was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
1 1 104.16.44.99 104.16.44.99 13335 (CLOUDFLAR...) (CLOUDFLARENET - Cloudflare)
1 19 104.16.45.99 104.16.45.99 13335 (CLOUDFLAR...) (CLOUDFLARENET - Cloudflare)
1 2606:4700::68... 2606:4700::6810:2c63 13335 (CLOUDFLAR...) (CLOUDFLARENET - Cloudflare)
19 2
Apex Domain
Subdomains		 Transfer
21 ietf.org 2 redirects
ietf.org — Cisco Umbrella Rank: 11094 13yr old
www.ietf.org — Cisco Umbrella Rank: 11644 9yr old
static.ietf.org — Cisco Umbrella Rank: 294214 3yr old
analytics.ietf.org — Cisco Umbrella Rank: 523978 6yr old
674 KB
19 1
Domain Requested by
15 www.ietf.org 1 redirects www.ietf.org
3 static.ietf.org www.ietf.org
static.ietf.org
2 analytics.ietf.org www.ietf.org
analytics.ietf.org
1 ietf.org 1 redirects
19 4
Subject Issuer Validity Valid
ietf.org
E8		 2026-03-11 -
2026-06-09		 3mo crt.sh
static.ietf.org
WE1		 2026-04-13 -
2026-07-12		 3mo crt.sh

This page contains 2 frames:

Primary Page: https://www.ietf.org/
Frame ID: 22AC4FED1388F204586F5EF2BDE5BB03
Requests: 17 HTTP requests in this frame

Frame: https://www.ietf.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/a80f1640690f/main.js
Frame ID: E88123E402C6440FE3D8E3D0D36C2038
Requests: 2 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

IETF | Internet Engineering Task Force

Page URL History Show full URLs

  1. http://ietf.org/ HTTP 307
    https://ietf.org/ HTTP 301
    https://www.ietf.org/ Page URL

Detected technologies

(Security)
Overall confidence: 100%
Detected patterns

Page Statistics

19
Requests

95 %
HTTPS

33 %
IPv6

1
Domains

4
Subdomains

2
IPs

2
Countries

674 kB
Transfer

1315 kB
Size

2
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://ietf.org/ HTTP 307
    https://ietf.org/ HTTP 301
    https://www.ietf.org/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 14
  • https://www.ietf.org/cdn-cgi/challenge-platform/scripts/jsd/main.js HTTP 302
  • https://www.ietf.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/a80f1640690f/main.js

19 HTTP transactions
0 data transactions

Method
Protocol		 Status Resource
Path		 Size
x-fer		 Time
Latency		 Type
MIME-Type		 IP
Location
GET
H3 		200
 Primary Request / Show response
www.ietf.org/
Redirect Chain
  • http://ietf.org/
  • https://ietf.org/
  • https://www.ietf.org/
83 KB
9 KB 		40ms
21ms 		Document
text/html		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
6d6e3e39e16c3763650d00398ac160edc5e5109170c127dccdb02e6c977a32fa
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Frame-Options DENY

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36

Response headers

age
594
alt-svc
h3=":443"; ma=86400
cache-control
public, max-age=14400
cf-cache-status
HIT
cf-ray
9f1c0e598de7d411-FRA
content-encoding
br
content-type
text/html; charset=utf-8
cross-origin-opener-policy
same-origin
date
Sat, 25 Apr 2026 08:42:44 GMT
expires
Sat, 25 Apr 2026 12:42:44 GMT
last-modified
Sat, 25 Apr 2026 08:32:59 GMT
priority
u=0,i
referrer-policy
same-origin
server
cloudflare
server-timing
cfExtPri
vary
Cookie accept-encoding
x-content-type-options
nosniff
x-frame-options
DENY

Redirect headers

alt-svc
h3=":443"; ma=86400
cf-ray
9f1c0e595d090ecf-FRA
content-length
0
date
Sat, 25 Apr 2026 08:42:44 GMT
location
https://www.ietf.org/
priority
u=0,i
server
cloudflare
server-timing
cfExtPri
GET
H3 		200
 import.css
static.ietf.org/fonts/inter/ 		17 KB
867 B 		38ms
26ms 		Stylesheet
text/css		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://static.ietf.org/fonts/inter/import.css
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
2c7ca5045d08246698e0d013365deb0503a2ef9edc7b93dc2639894611f93173

Request headers

sec-ch-ua-platform
"Linux"
Referer
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

server
cloudflare
cache-control
public, max-age=3600
content-encoding
br
cf-cache-status
HIT
etag
W/"7b61f256640b0692a7f9fe4e680aac32"
age
70440
cf-ray
9f1c0e59dec2d411-FRA
expires
Sat, 25 Apr 2026 09:42:44 GMT
access-control-allow-origin
*
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
text/css
last-modified
Tue, 18 Jul 2023 15:35:09 GMT
vary
Accept-Encoding
priority
u=0,i=?0
GET
H3 		200
 main.e2d621c55276.js Show response
www.ietf.org/static/dist/ 		210 KB
67 KB 		18ms
18ms 		Script
application/javascript		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/static/dist/main.e2d621c55276.js
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
2663514d6a04e5639effdd37b8eaa8d521eb3e0bb94f75703db282ba1d483734

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
content-encoding
br
cf-cache-status
HIT
etag
W/"69dd608d-34963"
age
254168
cf-ray
9f1c0e59ce85d411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
application/javascript
last-modified
Mon, 13 Apr 2026 21:30:53 GMT
server
cloudflare
priority
u=3,i=?0
GET
H3 		200
 main.0eac74df034a.css
www.ietf.org/static/dist/ 		332 KB
51 KB 		20ms
20ms 		Stylesheet
text/css		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/static/dist/main.0eac74df034a.css
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
aaf6ec69ecb2053f1b01f9f26b3cb79cdce22c8f29ec1a2ca318a128bfaab891

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
content-encoding
br
cf-cache-status
HIT
etag
W/"69dd608d-531ac"
age
38459
cf-ray
9f1c0e59ce84d411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
text/css
last-modified
Mon, 13 Apr 2026 21:30:53 GMT
server
cloudflare
priority
u=0,i=?0
GET
H3 		200
 ietf.svg
static.ietf.org/logos/ 		6 KB
2 KB 		38ms
26ms 		Image
image/svg+xml		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://static.ietf.org/logos/ietf.svg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
4b730cda8b8bf23aa7bbb6f97aa3d463c4c2f7ad540a07f8f9fb5b19643758c2

Request headers

sec-ch-ua-platform
"Linux"
Referer
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=3600
content-encoding
br
cf-cache-status
HIT
etag
W/"0d5bc1a95415e46f1e384d1f5e7bdbad"
age
22545
cf-ray
9f1c0e59dec5d411-FRA
expires
Sat, 25 Apr 2026 09:42:44 GMT
access-control-allow-origin
*
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/svg+xml
last-modified
Tue, 12 Sep 2023 21:02:41 GMT
server
cloudflare
priority
u=2,i
vary
Accept-Encoding
GET
H3 		200
 ietf-logo.width-600.jpg
www.ietf.org/media/images/ 		24 KB
25 KB 		118ms
118ms 		Image
image/jpeg		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/ietf-logo.width-600.jpg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
de45045d5b4f6af65b196fa332ffec28bd66aace9365bb340142a1aace224608

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"689e3e05-61e9"
cf-ray
9f1c0e59ce89d411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
25065
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/jpeg
last-modified
Thu, 14 Aug 2025 19:50:29 GMT
server
cloudflare
priority
u=2,i
GET
H3 		200
 things.width-600.jpg
www.ietf.org/media/images/ 		30 KB
30 KB 		123ms
123ms 		Image
image/jpeg		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/things.width-600.jpg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
3fa72d5c5b119b495f3426900777977bd2309291da039e2770f7e4b872c2f2b6

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"689e3e06-76cb"
cf-ray
9f1c0e59dea4d411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
30411
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/jpeg
last-modified
Thu, 14 Aug 2025 19:50:30 GMT
server
cloudflare
priority
u=2,i
GET
H3 		200
 _MG_4832.width-600.jpg
www.ietf.org/media/images/ 		48 KB
48 KB 		17ms
16ms 		Image
image/jpeg		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/_MG_4832.width-600.jpg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
97c8c83828eb6cb1cc063b39afb3a4bfbb5180242a5d8712e1af945d383cb439

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"689e3e04-bfa0"
age
3172
cf-ray
9f1c0e59dea7d411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
49056
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/jpeg
last-modified
Thu, 14 Aug 2025 19:50:28 GMT
server
cloudflare
priority
u=2,i
GET
H3 		200
 IMG_15.width-600.jpg
www.ietf.org/media/images/ 		41 KB
41 KB 		116ms
115ms 		Image
image/jpeg		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/IMG_15.width-600.jpg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
971f5d85f792929ec235c42eef75b5283dfaed94953eebf2cf95db42f2befe71

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"689e3e02-a285"
cf-ray
9f1c0e59dea9d411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
41605
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/jpeg
last-modified
Thu, 14 Aug 2025 19:50:26 GMT
server
cloudflare
priority
u=2,i
GET
H3 		200
 vienna.height-245.jpg
www.ietf.org/media/images/ 		45 KB
45 KB 		117ms
117ms 		Image
image/jpeg		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/vienna.height-245.jpg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
d6c998659f99a5443e3aea7dd0003d808de53b08bf26dd9bc4c2aa27891724e6

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"69af69dd-b3d3"
cf-ray
9f1c0e59deaad411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
46035
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/jpeg
last-modified
Tue, 10 Mar 2026 00:46:21 GMT
server
cloudflare
priority
u=3,i
GET
H3 		200
 111-SanFrancisco.height-245.jpg
www.ietf.org/media/images/ 		14 KB
14 KB 		114ms
114ms 		Image
image/jpeg		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/111-SanFrancisco.height-245.jpg
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
02541261ea26924428431b8b92929d43cf8f28c47b81a760c82762fe18341dfc

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"689e3e01-37e5"
cf-ray
9f1c0e59deacd411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
14309
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/jpeg
last-modified
Thu, 14 Aug 2025 19:50:25 GMT
server
cloudflare
priority
u=3,i
GET
H3 		200
 IETF125-banner.max-4000x4000.png
www.ietf.org/media/images/ 		129 KB
129 KB 		38ms
38ms 		Image
image/png		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to Show image
Full URL
https://www.ietf.org/media/images/IETF125-banner.max-4000x4000.png
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
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Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"699f6c40-204da"
age
3197
cf-ray
9f1c0e59deb2d411-FRA
expires
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accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
132314
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
image/png
last-modified
Wed, 25 Feb 2026 21:40:16 GMT
server
cloudflare
priority
u=3,i
GET
H3 		200
 matomo.js Show response
analytics.ietf.org/ 		66 KB
22 KB 		35ms
18ms 		Script
application/javascript		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://analytics.ietf.org/matomo.js
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
1762dd6a64fcd59421610b68625258f9224a1f278159c4d99282adb631470465

Request headers

sec-ch-ua-platform
"Linux"
Referer
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=86400
content-encoding
br
cf-cache-status
HIT
pragma
public
age
17152
etag
W/"698296d5-10984"
cf-ray
9f1c0e5a4fbed411-FRA
expires
Sun, 26 Apr 2026 08:42:44 GMT
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
application/javascript
last-modified
Wed, 04 Feb 2026 00:46:13 GMT
server
cloudflare
priority
u=3,i=?0
GET
H2 		200
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static.ietf.org/fonts/inter/ 		37 KB
38 KB 		55ms
24ms 		Font
font/woff2		 2606:4700::6810:2c63
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://static.ietf.org/fonts/inter/inter-latin.woff2
Requested by
Host: static.ietf.org
URL: https://static.ietf.org/fonts/inter/import.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:2c63 -, , ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
450f3ba4e47ee174bd9692b396f264b907d37d2528f53911760f3d0edb785f7e

Request headers

Origin
https://www.ietf.org
sec-ch-ua-platform
"Linux"
Referer
https://static.ietf.org/fonts/inter/import.css
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=3600
cf-cache-status
HIT
etag
"e08be6d5d433944f7ad52902e4d24db5"
age
6272
cf-ray
9f1c0e5a79dc37e8-FRA
expires
Sat, 25 Apr 2026 09:42:44 GMT
accept-ranges
bytes
access-control-allow-origin
*
content-length
37924
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
font/woff2
last-modified
Mon, 15 May 2023 20:04:04 GMT
vary
Origin, Accept-Encoding
server
cloudflare
GET
H3 		200
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www.ietf.org/static/dist/ 		131 KB
131 KB 		17ms
17ms 		Font
font/woff2		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/static/dist/92ea18a81d737146ff044ddb52010366.84a4d15b9e44.woff2
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/static/dist/main.0eac74df034a.css
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
6c75710364a1ca5604267716f6d28997b26319fdb078cf11e0b42ab66ff2ea61

Request headers

Origin
https://www.ietf.org
sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/static/dist/main.0eac74df034a.css
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

cache-control
public, max-age=14400
cf-cache-status
HIT
etag
"69dd608d-20b9c"
age
387106
cf-ray
9f1c0e5a4fdfd411-FRA
expires
Sat, 25 Apr 2026 12:42:44 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
134044
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
font/woff2
last-modified
Mon, 13 Apr 2026 21:30:53 GMT
server
cloudflare
priority
u=0,i=?0
GET
H3 		200
 main.js Show response
www.ietf.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/a80f1640690f/ Frame E881
Redirect Chain
  • https://www.ietf.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
  • https://www.ietf.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/a80f1640690f/main.js?
24 KB
11 KB 		13ms
13ms 		Script
application/javascript		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/a80f1640690f/main.js?
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/
Protocol
H3
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
7dc66253f310eebb765848578ab13f9382cd02f3affcd3dd48d58fe620ca06ad
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Referer

Response headers

cache-control
max-age=14400, stale-if-error=10800, stale-while-revalidate=10800, public
content-encoding
br
x-content-type-options
nosniff
cf-ray
9f1c0e5a7872d411-FRA
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
application/javascript; charset=UTF-8
server
cloudflare
priority
u=3,i=?0

Redirect headers

cache-control
max-age=300, stale-if-error=10800, stale-while-revalidate=10800, public
location
/cdn-cgi/challenge-platform/h/g/scripts/jsd/a80f1640690f/main.js?
cf-ray
9f1c0e5a6843d411-FRA
access-control-allow-origin
*
alt-svc
h3=":443"; ma=86400
content-length
0
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
server
cloudflare
priority
u=3,i=?0
POST
H3 		204
 matomo.php
analytics.ietf.org/ 		0
0 		339ms
338ms 		Ping
text/html		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://analytics.ietf.org/matomo.php?action_name=IETF%20%7C%20Internet%20Engineering%20Task%20Force&idsite=1&rec=1&r=193610&h=10&m=42&s=44&url=https%3A%2F%2Fwww.ietf.org%2F&_id=&_idn=1&send_image=0&_refts=0&pv_id=96g7wy&pf_net=20&pf_srv=19&pf_tfr=4&pf_dm1=86&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.0.0%22%7D%2C%7B%22brand%22%3A%22Google%20Chrome%22%2C%22version%22%3A%22147.0.0.0%22%7D%2C%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%5D%2C%22mobile%22%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22Linux%22%2C%22platformVersion%22%3A%22%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=1600x1200
Requested by
Host: analytics.ietf.org
URL: https://analytics.ietf.org/matomo.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
/
Resource Hash
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Request headers

sec-ch-ua-platform
"Linux"
Referer
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
Content-Type
application/x-www-form-urlencoded; charset=utf-8
sec-ch-ua-mobile
?0

Response headers
POST
H3 		200
 9f1c0e598de7d411 Show response
www.ietf.org/cdn-cgi/challenge-platform/h/g/jsd/oneshot/a80f1640690f/0.6881466173879295:1777104771:nKBwh4zEECMqJHzWGQjK8F_iQpRmFxCdUYNZR5JfTf4/ Frame E881 		0
1 KB 		15ms
10ms 		XHR
text/plain		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/cdn-cgi/challenge-platform/h/g/jsd/oneshot/a80f1640690f/0.6881466173879295:1777104771:nKBwh4zEECMqJHzWGQjK8F_iQpRmFxCdUYNZR5JfTf4/9f1c0e598de7d411
Requested by
Host: www.ietf.org
URL: https://www.ietf.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Request headers

sec-ch-ua-platform
"Linux"
Referer
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
Content-Type
text/plain;charset=UTF-8
sec-ch-ua-mobile
?0

Response headers

timing-allow-origin
https://www.ietf.org
cf-ray
9f1c0e5ac940d411-FRA
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
content-length
0
cf-chl-out-s
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date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
text/plain; charset=UTF-8
server
cloudflare
priority
u=1,i
GET
H3 		404
 favicon.ico
www.ietf.org/ 		76 KB
8 KB 		20ms
20ms 		Other
text/html		 104.16.45.99
Cloudflare
General
Check archive.org
Download Go to
Full URL
https://www.ietf.org/favicon.ico
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
104.16.45.99 , Ascension Island, ASN13335 (CLOUDFLARENET - Cloudflare, Inc., US),
Reverse DNS
Software
cloudflare /
Resource Hash
2f461e4c44bef0a8feda1f0b3a0eda71d5ac39f92d7c26dc0b6f7721a2764032
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Frame-Options DENY

Request headers

sec-ch-ua-platform
"Linux"
Referer
https://www.ietf.org/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
sec-ch-ua
"Chromium";v="147", "Google Chrome";v="147", "Not-A.Brand";v="24"
sec-ch-ua-mobile
?0

Response headers

content-encoding
br
cf-cache-status
HIT
age
136
x-content-type-options
nosniff
expires
Sat, 25 Apr 2026 12:42:44 GMT
alt-svc
h3=":443"; ma=86400
server-timing
cfExtPri
date
Sat, 25 Apr 2026 08:42:44 GMT
content-type
text/html; charset=utf-8
vary
Cookie, accept-encoding
priority
u=1,i
x-frame-options
DENY
cache-control
public, max-age=14400
cross-origin-opener-policy
same-origin
referrer-policy
same-origin
cf-ray
9f1c0e5ad964d411-FRA
server
cloudflare

Verdicts & Comments Add Verdict or Comment

12 JavaScript Window variables

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

object| 0 string| staticRoot object| _paq number| uidEvent function| $ function| jQuery object| Popper object| bootstrap object| Piwik object| Matomo object| AnalyticsTracker function| piwik_log

2 Cookies

Cookies are little pieces of information stored in the browser of a user. Whenever a user visits the site again, he will also send his cookie values, thus allowing the website to re-identify him even if he changed locations. This is how permanent logins work.

Domain/Path Expires Name / Value
.ietf.org/ 1970-01-21
22:24:02 		Name: cf_clearance
Value: RzQICc6j.vWxv4YZKI5m5aFsngWTIqf9X0GubcYnio0-1777106564-1.2.1.1-yZcbhoGYeNlqiw_EH411DViUi_eX.a1cbeMIfDuztB4HD2KcbJpQ8yCWsFZRwo485CAaI0S7ZY0Acr4fGJUkRr39su1a7U4UfWiiH6ojU1Ifez.lnDLNxb2rxTBl4zjrszW3kF42EPQyzntNNMm8Z1xZgLIGsLZJbUc1xFlbQr0JLsrYJerSn_TSfNvkTHtFe95.JLIgV6Dn._ZZe9KkO14HgUAJidXFAI7tAHKUPSwfzY1S4elNcSHBBBwKcmQo7_Bxq8DC9OUYPpVze86BRkjlTsk339mbQlhCPk0hzEk38CJSqqSeXNz5nzcqEZF6_XRSoJ5ufBByJizvEq1BUQ
.ietf.org/ 1970-01-21
13:38:28 		Name: __cf_bm
Value: PONuajTs0VKhoEkaHwj8EheOUqJ4NTT4eedSI8KKGCI-1777106564.289507-1.0.1.1-oLJr9F5DTheJK33IfjT9kXzWSzfSrY6_9Hoh8Pdz1jNlNMb6A8BC83OeKp6OF4.AUTnG3P3gWuyFmtoU7.n08fR1O1cEKj3fu54oDPlkhJ_758RFY_P8AS4xZOVwrwsJ

1 Console Messages

A page may trigger messages to the console to be logged. These are often error messages about being unable to load a resource or execute a piece of JavaScript. Sometimes they also provide insight into the technology behind a website.

Source Level URL
Text
network error URL: https://www.ietf.org/favicon.ico
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-Content-Type-Options nosniff
X-Frame-Options DENY