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code.cs50.io Open in urlscan Pro
52.44.232.251  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: http://cs50.io/
Effective URL: https://code.cs50.io/
Submission: On April 18 via api from US — Scanned from DE
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 4 IPs in 2 countries across 4 domains to perform 12 HTTP transactions. The main IP is 52.44.232.251, located in Ashburn, United States and belongs to AMAZON-AES, US. The main domain is code.cs50.io.
TLS certificate: Issued by Amazon RSA 2048 M01 on February 24th 2023. Valid for: a year.
This is the only time code.cs50.io was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
2 2 75.2.60.5 16509 (AMAZON-02)
2 52.44.232.251 14618 (AMAZON-AES)
2 2606:4700:e2:... 13335 (CLOUDFLAR...)
6 2606:4700::68... 13335 (CLOUDFLAR...)
2 52.215.192.131 16509 (AMAZON-02)
12 4
2    75.2.60.5 (United States)

ASN16509 (AMAZON-02, US)
PTR: acd89244c803f7181.awsglobalaccelerator.com
cs50.io
2    52.44.232.251 (Ashburn, United States)

ASN14618 (AMAZON-AES, US)
PTR: ec2-52-44-232-251.compute-1.amazonaws.com
code.cs50.io
2    2606:4700:e2::ac40:850f (United States)

ASN13335 (CLOUDFLARENET, US)
use.fontawesome.com
6    2606:4700::6810:5614 (United States)

ASN13335 (CLOUDFLARENET, US)
cdn.jsdelivr.net
2    52.215.192.131 (Dublin, Ireland)

ASN16509 (AMAZON-02, US)
PTR: ec2-52-215-192-131.eu-west-1.compute.amazonaws.com
g9mp5m2251ps.statuspage.io
Apex Domain
Subdomains		 Transfer
6 jsdelivr.net
cdn.jsdelivr.net — Cisco Umbrella Rank: 474
234 KB
4 cs50.io
cs50.io — Cisco Umbrella Rank: 619958
code.cs50.io
15 KB
2 statuspage.io
g9mp5m2251ps.statuspage.io
5 KB
2 fontawesome.com
use.fontawesome.com — Cisco Umbrella Rank: 1543
88 KB
12 4
Domain Requested by
6 cdn.jsdelivr.net code.cs50.io
2 g9mp5m2251ps.statuspage.io code.cs50.io
g9mp5m2251ps.statuspage.io
2 use.fontawesome.com code.cs50.io
use.fontawesome.com
2 code.cs50.io code.cs50.io
2 cs50.io 2 redirects
12 5

This site contains links to these domains. Also see Links.

Domain
github.com
cs50.readthedocs.io
docs.github.com
Subject Issuer Validity Valid
cs50.io
Amazon RSA 2048 M01		 2023-02-24 -
2024-01-22		 a year crt.sh
sni.cloudflaressl.com
Cloudflare Inc ECC CA-3		 2022-06-06 -
2023-06-05		 a year crt.sh
*.statuspage.io
DigiCert TLS RSA SHA256 2020 CA1		 2022-08-08 -
2023-08-22		 a year crt.sh

This page contains 2 frames:

Primary Page: https://code.cs50.io/
Frame ID: 655FFE2F9701CA2C48C4E91A938491E7
Requests: 11 HTTP requests in this frame

Frame: https://g9mp5m2251ps.statuspage.io/embed/frame
Frame ID: 580FA9FEFEF6515C42CF8CB7F1523959
Requests: 1 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

Visual Studio Code for CS50

Page URL History Show full URLs

  1. http://cs50.io/ HTTP 301
    https://cs50.io/ HTTP 301
    https://code.cs50.io/ Page URL

Detected technologies

Overall confidence: 100%
Detected patterns
  • <link[^>]* href=[^>]*?bootstrap(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)[^>]*?(?:\.min)?\.css
  • bootstrap(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)[^>]*?(?:\.min)?\.js
Overall confidence: 100%
Detected patterns
  • <link[^>]* href=[^>]*?(?:F|f)o(?:n|r)t-?(?:A|a)wesome(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)
  • (?:F|f)o(?:n|r)t-?(?:A|a)wesome(?:.*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)
Overall confidence: 100%
Detected patterns
  • jquery.*\.js(?:\?ver(?:sion)?=([\d.]+))?
Overall confidence: 100%
Detected patterns
  • <link [^>]*?href="?[a-zA-Z]*?:?//cdn\.jsdelivr\.net/
  • //cdn\.jsdelivr\.net/

Page Statistics

12
Requests

100 %
HTTPS

40 %
IPv6

4
Domains

5
Subdomains

4
IPs

2
Countries

342 kB
Transfer

1789 kB
Size

3
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://cs50.io/ HTTP 301
    https://cs50.io/ HTTP 301
    https://code.cs50.io/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

12 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request /
code.cs50.io/
Redirect Chain
  • http://cs50.io/
  • https://cs50.io/
  • https://code.cs50.io/
12 KB
5 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://code.cs50.io/
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
52.44.232.251 Ashburn, United States, ASN14618 (AMAZON-AES, US),
Reverse DNS
ec2-52-44-232-251.compute-1.amazonaws.com
Software
nginx/1.22.1 /
Resource Hash
8ee68790e596464107c865d65f23c14860d35c2907b9395710018949ab7e4904
Security Headers
Name Value
Content-Security-Policy frame-ancestors 'self'
Strict-Transport-Security max-age=60

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36
accept-language
de-DE,de;q=0.9

Response headers

Cache-Control
no-cache, no-store, must-revalidate
Cache-control
no-cache="set-cookie"
Connection
keep-alive
Content-Encoding
gzip
Content-Length
3786
Content-Security-Policy
frame-ancestors 'self'
Content-Type
text/html; charset=utf-8
Date
Tue, 18 Apr 2023 19:02:02 GMT
Expires
0
Pragma
no-cache
Server
nginx/1.22.1
Status
200 OK
Strict-Transport-Security
max-age=60

Redirect headers

age
81455
cache-control
public, max-age=0, must-revalidate
content-length
36
content-type
text/plain; charset=utf-8
date
Mon, 17 Apr 2023 20:24:27 GMT
location
https://code.cs50.io/
server
Netlify
strict-transport-security
max-age=31536000
x-nf-request-id
01GYAVXK11WVYNTYT2D2VEB5WX
all.css
use.fontawesome.com/releases/v5.13.0/css/ 		57 KB
13 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://use.fontawesome.com/releases/v5.13.0/css/all.css
Requested by
Host: code.cs50.io
URL: https://code.cs50.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700:e2::ac40:850f , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
876d023d9d10c97941b80c3b03e2a5b94631ff7a4af9cee5604a6a2d39718d84

Request headers

Referer
https://code.cs50.io/
Origin
https://code.cs50.io
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36

Response headers

date
Tue, 18 Apr 2023 19:02:02 GMT
content-encoding
br
cf-cache-status
HIT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
x-amz-request-id
MFXFQ47TSV9CW0CQ
age
741077
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
x-amz-id-2
gruQXdtSF2W5wk+hPyNved2INFimaYFrdG2Jywlg5qMUTItG/iGI9MerviSzqknNgkr7w8th3eg=
last-modified
Wed, 30 Jun 2021 15:38:38 GMT
server
cloudflare
etag
W/"76cb46c10b6c0293433b371bae2414b2"
access-control-max-age
3000
vary
Origin, Access-Control-Request-Headers, Access-Control-Request-Method, Accept-Encoding
access-control-allow-methods
GET
access-control-allow-origin
*
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=cwfrksJGD2fdWIxtyh3VTciKLIqWeD4zwli28lnyAHk8wjvbhAtu7eIs4hSWE8tRLJKB76BivZxKm6qmENwvqGPy8hlgrt3MqC6uiUKB1sq%2F7g09C07%2FnBbzNm88wimAgQcDgOl9jom6H0Iw4r4VKw4d"}],"group":"cf-nel","max_age":604800}
content-type
text/css
cache-control
max-age=31556926
cf-ray
7b9f28e96add2c4f-FRA
bootstrap.min.css
cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/ 		227 KB
33 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css
Requested by
Host: code.cs50.io
URL: https://code.cs50.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:5614 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
16ee7f3d53462650bbd32e263c48c0ea759574fcf620c681ad719008912c461a
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://code.cs50.io/
Origin
https://code.cs50.io
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36

Response headers

date
Tue, 18 Apr 2023 19:02:02 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
nel
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
age
1335872
x-jsd-version
5.3.0-alpha3
content-encoding
br
x-cache
MISS, MISS
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
x-served-by
cache-fra-eddf8230067-FRA, cache-yyz4536-YYZ
x-jsd-version-type
version
server
cloudflare
etag
W/"38cf3-SvPX4VpqOAxsurukLprfMwtJ1Y8"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=hYEbLFL0x3LsnTt5AMXCruvFfzHB12kJeQcrOmLOImr6zxKMI%2FQ5A1XnyjPtR8NymMY3xC0nqJKD%2FGSPfsItQIm3x55Q7%2Ba1b5JiftRW9PgCQXVBUcX3py3pPntFUvFK9pLknmhDNsmFkQ44kr8%3D"}],"group":"cf-nel","max_age":604800}
content-type
text/css; charset=utf-8
access-control-allow-origin
*
access-control-expose-headers
*
cache-control
public, max-age=31536000, s-maxage=31536000, immutable
timing-allow-origin
*
cf-ray
7b9f28e969a03720-FRA
bootstrap.bundle.min.js
cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/ 		79 KB
24 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js
Requested by
Host: code.cs50.io
URL: https://code.cs50.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:5614 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
ea8fe021a4ace4f6786fecc418f70b658fc2dc02d136e8fe5c6ab6b62a46d5d0
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://code.cs50.io/
Origin
https://code.cs50.io
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36

Response headers

date
Tue, 18 Apr 2023 19:02:02 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
nel
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
age
1335872
x-jsd-version
5.3.0-alpha3
content-encoding
br
x-cache
MISS, MISS
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
x-served-by
cache-fra-eddf8230059-FRA, cache-yyz4564-YYZ
x-jsd-version-type
version
server
cloudflare
etag
W/"13ac2-jNeXExg3GrPRY3nfbPslSlxkn8o"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=NbcJMFGBgy22A1tKjgdBJ2y1K0w9cIZrsj4ZCNX%2Fb5wSaowo36tDc%2BS7%2FfX6hEr5%2FSY0XzivbYdboIjwYAKNcpxS09GIf6sCgpNTQS4ZtO7cbp1Kqn8L0dz9b4%2Fof5u975fqvehmr7OlDhsjplk%3D"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
access-control-expose-headers
*
cache-control
public, max-age=31536000, s-maxage=31536000, immutable
timing-allow-origin
*
cf-ray
7b9f28e969a33720-FRA
jquery.min.js
cdn.jsdelivr.net/npm/jquery@3.6.4/dist/ 		88 KB
32 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://cdn.jsdelivr.net/npm/jquery@3.6.4/dist/jquery.min.js
Requested by
Host: code.cs50.io
URL: https://code.cs50.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:5614 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
a0fe8723dcf55da64d06b25446d0a8513e52527c45afcb37073465f9c6f352af
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://code.cs50.io/
Origin
https://code.cs50.io
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36

Response headers

date
Tue, 18 Apr 2023 19:02:02 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
nel
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
age
3500904
x-jsd-version
3.6.4
content-encoding
br
x-cache
HIT, MISS
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
x-served-by
cache-fra-eddf8230058-FRA, cache-yyz4526-YYZ
x-jsd-version-type
version
server
cloudflare
etag
W/"15ec3-7aRnR8cdOKiAvuRPmkOcOFi7j5k"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=3ar5Stzo8EE3nNRiXWdaCyDB7EApkOw5i%2BY8TzZnojSYjW0IyjGKqRgSwO2UV%2F5URlMQoXuxekUoBW9yh5E%2FB%2FBNvux0mz%2Buoo3ESSNg23bOEEAlCag%2B3hDZc0BdAVsbPkg2Kmx3ju4cEjz%2FGI8%3D"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
access-control-expose-headers
*
cache-control
public, max-age=31536000, s-maxage=31536000, immutable
timing-allow-origin
*
cf-ray
7b9f28e969a43720-FRA
bundled.js
cdn.jsdelivr.net/npm/bowser@2.11.0/ 		111 KB
35 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://cdn.jsdelivr.net/npm/bowser@2.11.0/bundled.js
Requested by
Host: code.cs50.io
URL: https://code.cs50.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:5614 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
7d0ca00f8d9e704365b729310ae4542caa1eb8e687cbab89cfc2635bfa36480c
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://code.cs50.io/
Origin
https://code.cs50.io
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36

Response headers

date
Tue, 18 Apr 2023 19:02:02 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
nel
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
age
4786914
x-jsd-version
2.11.0
content-encoding
br
x-cache
HIT, HIT
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
x-served-by
cache-fra-eddf8230106-FRA, cache-yyz4542-YYZ
x-jsd-version-type
version
server
cloudflare
etag
W/"1bc63-Szomqy2jbvoyoj+g2ghTKN7AxxE"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=keVZKgEEijF5bPLAv1tZIlC1YYOlCyAIs5IK78VO0RB6TXdF5ZBIZPBiDM5NHENIQmNbY5oifVEAEyFmFp4fM%2FivlfoFU6W5ALcdne73Md%2BXZs40FZ8emxdQbgOf3VKZXzLQ6Q%2BGpBgtPTEFstk%3D"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
access-control-expose-headers
*
cache-control
public, max-age=31536000, s-maxage=31536000, immutable
timing-allow-origin
*
cf-ray
7b9f28e969a63720-FRA
moment-with-locales.min.js
cdn.jsdelivr.net/npm/moment@2.29.4/min/ 		360 KB
73 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://cdn.jsdelivr.net/npm/moment@2.29.4/min/moment-with-locales.min.js
Requested by
Host: code.cs50.io
URL: https://code.cs50.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:5614 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
430725b95468277dcbccc27e08e3d873276c0082737310b0b1ad330392511847
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://code.cs50.io/
Origin
https://code.cs50.io
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.121 Safari/537.36

Response headers

date
Tue, 18 Apr 2023 19:02:02 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
nel
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
age
4785821
x-jsd-version
2.29.4
content-encoding
br
x-cache
HIT, MISS
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
x-served-by
cache-fra-eddf8230117-FRA, cache-yyz4551-YYZ
x-jsd-version-type
version
server
cloudflare
etag
W/"5a17b-QFmuyh0Lma7IAGs3qSfwnZwOeU0"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=qjjPVVQm6bbfAGaQIk2FpxuHJW5upxnQaoIXrtqlM%2FJuRahP%2BkssJsB6EZnsHNpiQ8mncIEJtohoBJVyiAfp%2F7JVzgugXXE1w6T4XpSm%2Bga0aVhPIdeYMDBxPkqVDWF27oqhY1eE43AvqiDl%2BOg%3D"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
access-control-expose-headers
*
cache-control
public, max-age=31536000, s-maxage=31536000, immutable
timing-allow-origin
*
cf-ray
7b9f28e969af3720-FRA
moment-timezone-with-data.min.js
cdn.jsdelivr.net/npm/moment-timezone@0.5.40/builds/ 		757 KB
37 KB 		Script
General
Check archive.org
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Full URL
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15 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 boolean| credentialless number| uidEvent object| bootstrap function| $ function| jQuery object| __core-js_shared__ object| core function| setImmediate function| clearImmediate object| regeneratorRuntime boolean| _babelPolyfill function| bowser function| moment function| statusEmbedTest

3 Cookies

Domain/Path Name / Value
code.cs50.io/ Name: session
Value: 7fe88e62-6ceb-417a-90b9-a7ed26196999
code.cs50.io/ Name: AWSELB
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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
Content-Security-Policy frame-ancestors 'self'
Strict-Transport-Security max-age=60