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Notes

Updated every 15 minutes. Last check: October 29, 2023 07:00

TL;DR Version

Click to view more detailed information.

NSFW - API

OFFLINE

NSFW - Boards

ONLINE

NSFW - Front Page

OFFLINE

NSFW - Posting

ONLINE

SFW - Front Page

OFFLINE

SFW - Boards

ONLINE

SFW - API

ONLINE

SFW - Posting

ONLINE

reCaptcha - Static

ONLINE

reCaptcha - Loader

ONLINE

Static

ONLINE

Thumbnails

ONLINE

Images

ONLINE

Search

OFFLINE

Detailed Information

NSFW - API

The API server provides JSON endpoints for archivers, browser extensions, and mobile apps.

I perform additional testing to ensure that output complies with JSON schemas.

a.4cdn.org
OFFLINE
104.16.6.182
Tests
  • GET https://104.16.6.182/diy/thread/670504.json
    • HTTP 404
    • 85.277ms
OFFLINE
104.16.9.182
Tests
  • GET https://104.16.9.182/diy/thread/670504.json
    • HTTP 404
    • 71.708ms
OFFLINE
104.16.7.182
Tests
  • GET https://104.16.7.182/diy/thread/670504.json
    • HTTP 404
    • 65.198ms
OFFLINE
104.16.5.182
Tests
  • GET https://104.16.5.182/diy/thread/670504.json
    • HTTP 404
    • 63.301ms
OFFLINE
104.16.8.182
Tests
  • GET https://104.16.8.182/diy/thread/670504.json
    • HTTP 404
    • 74.337ms
SKIPPED
2606:4700::6810:5b6
SKIPPED
2606:4700::6810:6b6
SKIPPED
2606:4700::6810:7b6
SKIPPED
2606:4700::6810:9b6
SKIPPED
2606:4700::6810:8b6
api.4chan.org
OFFLINE
104.19.142.99
Tests
  • GET https://104.19.142.99/diy/thread/670504.json
    • HTTP 404
    • 198.978ms
OFFLINE
104.19.143.99
Tests
  • GET https://104.19.143.99/diy/thread/670504.json
    • HTTP 404
    • 188.505ms

NSFW - Boards

All adult board indexes, pages, and threads are hosted on these servers.

boards.4chan.org
ONLINE
104.19.143.99
Tests
  • GET https://104.19.143.99/
    • HTTP 302
    • 58.002ms
ONLINE
104.19.142.99
Tests
  • GET https://104.19.142.99/
    • HTTP 302
    • 56.799ms

NSFW - Front Page

These servers provide the 4chan front page, rules, and news blog.

www.4chan.org
OFFLINE
104.19.143.99
Tests
  • GET https://104.19.143.99/
    • HTTP 403
    • 11.354ms
OFFLINE
104.19.142.99
Tests
  • GET https://104.19.142.99/
    • HTTP 403
    • 10.63ms

NSFW - Posting

This server accepts POST requests in order for users to make new threads and replies, and performs 4chan pass logins.

The tests I use to check for posting availability are crude and sensitive to security changes. I am welcome to suggestions.

sys.4chan.org
ONLINE
104.19.143.99
Tests
  • GET https://104.19.143.99/auth
    • HTTP 200
    • 193.73ms
  • POST /qa/post
    • HTTP 200
    • 60.488ms
ONLINE
104.19.142.99
Tests
  • GET https://104.19.142.99/auth
    • HTTP 200
    • 182.977ms
  • POST /qa/post
    • HTTP 200
    • 60.52ms

SFW - Front Page

This server hosts the front page for the SFW boards.

4channel.org
OFFLINE
104.17.169.84
Tests
  • GET https://104.17.169.84/
    • HTTP 403
    • 22.957ms
OFFLINE
104.18.236.77
Tests
  • GET https://104.18.236.77/
    • HTTP 403
    • 21.996ms

SFW - Boards

This server hosts the SFW boards.

boards.4channel.org
ONLINE
104.18.236.77
Tests
  • GET https://104.18.236.77/
    • HTTP 302
    • 68.104ms
ONLINE
104.17.169.84
Tests
  • GET https://104.17.169.84/
    • HTTP 302
    • 83.241ms

SFW - API

This server hosts the API endpoints for the SFW boards.

I perform additional testing to ensure that output complies with JSON schemas.

api.4channel.org
ONLINE
104.17.169.84
Tests
  • GET https://104.17.169.84/
    • HTTP 302
    • 175.267ms
ONLINE
104.18.236.77
Tests
  • GET https://104.18.236.77/
    • HTTP 302
    • 179.329ms

SFW - Posting

This server accepts POST requests in order for users to make new threads and replies, and performs 4chan pass logins.

The tests I use to check for posting availability are crude and sensitive to security changes.

sys.4channel.org
ONLINE
104.17.169.84
Tests
  • GET https://104.17.169.84/auth
    • HTTP 200
    • 173.187ms
  • POST /qa/post
    • HTTP 200
    • 60.599ms
ONLINE
104.18.236.77
Tests
  • GET https://104.18.236.77/auth
    • HTTP 200
    • 173.571ms
  • POST /qa/post
    • HTTP 200
    • 60.492ms

reCaptcha - Static

The static URL the loader loads. Contains the actual reCaptcha client code.

Tested since lack of reCaptcha has resulted in users being unable to post.

www.gstatic.com
ONLINE
142.250.138.94
rDNS
rw-in-f94.1e100.net
Tests
  • GET https://142.250.138.94/recaptcha/releases/vm_YDiq1BiI3a8zfbIPZjtF2/recaptcha__en.js
    • HTTP 200
    • 21.942ms
SKIPPED
2607:f8b0:4023:1006::5e

reCaptcha - Loader

This is what 4chan loads to start up reCaptcha.

Tested since lack of reCaptcha has resulted in users being unable to post.

www.google.com
ONLINE
142.250.138.147
rDNS
rw-in-f147.1e100.net
Tests
  • GET https://142.250.138.147/recaptcha/api.js
    • HTTP 200
    • 27.232ms
ONLINE
142.250.138.104
rDNS
rw-in-f104.1e100.net
Tests
  • GET https://142.250.138.104/recaptcha/api.js
    • HTTP 200
    • 38.857ms
ONLINE
142.250.138.105
rDNS
rw-in-f105.1e100.net
Tests
  • GET https://142.250.138.105/recaptcha/api.js
    • HTTP 200
    • 22.559ms
ONLINE
142.250.138.106
rDNS
rw-in-f106.1e100.net
Tests
  • GET https://142.250.138.106/recaptcha/api.js
    • HTTP 200
    • 23.868ms
ONLINE
142.250.138.103
rDNS
rw-in-f103.1e100.net
Tests
  • GET https://142.250.138.103/recaptcha/api.js
    • HTTP 200
    • 21.854ms
ONLINE
142.250.138.99
rDNS
rw-in-f99.1e100.net
Tests
  • GET https://142.250.138.99/recaptcha/api.js
    • HTTP 200
    • 26.008ms
SKIPPED
2607:f8b0:4023:1006::68
SKIPPED
2607:f8b0:4023:1006::67
SKIPPED
2607:f8b0:4023:1006::93
SKIPPED
2607:f8b0:4023:1006::6a
www.recaptcha.com
ONLINE
142.250.113.94
rDNS
rs-in-f94.1e100.net
Tests
  • GET https://142.250.113.94/recaptcha/api.js
    • HTTP 301
    • 30.025ms
SKIPPED
2607:f8b0:4023:1000::5e

Static

These servers handle static assets, like banners, CSS, and Javascript.

s.4cdn.org
ONLINE
104.16.6.182
Tests
  • GET https://104.16.6.182/
    • HTTP 302
    • 71.991ms
ONLINE
104.16.7.182
Tests
  • GET https://104.16.7.182/
    • HTTP 302
    • 71.172ms
ONLINE
104.16.9.182
Tests
  • GET https://104.16.9.182/
    • HTTP 302
    • 76.682ms
ONLINE
104.16.5.182
Tests
  • GET https://104.16.5.182/
    • HTTP 302
    • 73.111ms
ONLINE
104.16.8.182
Tests
  • GET https://104.16.8.182/
    • HTTP 302
    • 70.372ms
SKIPPED
2606:4700::6810:8b6
SKIPPED
2606:4700::6810:5b6
SKIPPED
2606:4700::6810:7b6
SKIPPED
2606:4700::6810:9b6
SKIPPED
2606:4700::6810:6b6

Thumbnails

These servers store and serve image thumbnails.

t.4cdn.org
ONLINE
104.16.6.182
Tests
  • GET https://104.16.6.182/
    • HTTP 302
    • 65.639ms
ONLINE
104.16.9.182
Tests
  • GET https://104.16.9.182/
    • HTTP 302
    • 61.733ms
ONLINE
104.16.8.182
Tests
  • GET https://104.16.8.182/
    • HTTP 302
    • 61.523ms
ONLINE
104.16.7.182
Tests
  • GET https://104.16.7.182/
    • HTTP 302
    • 58.165ms
ONLINE
104.16.5.182
Tests
  • GET https://104.16.5.182/
    • HTTP 302
    • 66.223ms
SKIPPED
2606:4700::6810:9b6
SKIPPED
2606:4700::6810:5b6
SKIPPED
2606:4700::6810:6b6
SKIPPED
2606:4700::6810:7b6
SKIPPED
2606:4700::6810:8b6

Images

The servers in this group are used to host full-sized user-generated images. New servers are added and removed every so often.

i.4cdn.org
ONLINE
104.16.8.182
Tests
  • GET https://104.16.8.182/
    • HTTP 302
    • 50.594ms
ONLINE
104.16.9.182
Tests
  • GET https://104.16.9.182/
    • HTTP 302
    • 58.64ms
ONLINE
104.16.7.182
Tests
  • GET https://104.16.7.182/
    • HTTP 302
    • 54.593ms
ONLINE
104.16.6.182
Tests
  • GET https://104.16.6.182/
    • HTTP 302
    • 52.16ms
ONLINE
104.16.5.182
Tests
  • GET https://104.16.5.182/
    • HTTP 302
    • 51.098ms
SKIPPED
2606:4700::6810:6b6
SKIPPED
2606:4700::6810:8b6
SKIPPED
2606:4700::6810:9b6
SKIPPED
2606:4700::6810:7b6
SKIPPED
2606:4700::6810:5b6

Search

This server accepts GET requests so users can search for threads.

find.4chan.org
OFFLINE
104.19.142.99
Tests
  • GET https://104.19.142.99/
    • HTTP 403
    • 22.021ms
OFFLINE
104.19.143.99
Tests
  • GET https://104.19.143.99/
    • HTTP 403
    • 20.1ms

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