github.com
github.com describes itself as "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances…". It was registered in 2007, served from Frankfurt am Main, Germany. It has a valid HTTPS certificate, 5 of 6 common security headers.
What is github.com about?
The words appearing most often on the homepage, excluding common filler, are a rough indication of subject matter rather than a description of the business:
- github ×29
- code ×15
- copilot ×14
- explore ×11
- customer ×5
- window ×4
- software ×4
- development ×4
- source ×4
- another ×3
Does github.com publish the usual trust pages?
All four of the pages a established business normally publishes were found: about, contact, privacy and terms. These were checked at conventional paths only, so a site using different URLs may publish them elsewhere.
How does github.com compare with other domains analysed here?
Measured against the 121 domains in this index. This is a small, self-selected sample — the domains people happened to look up — not a representative sample of the web.
| Response time | Faster than 95% of them (median 790ms) |
|---|---|
| Security headers | More than 95% of them |
| Domain age | Older than 91% of them |
Related domains in this index
Other analysed domains served from the same country:
When was github.com registered?
github.com was registered on 9 October 2007, which makes it about 18 years old.
A registration this old means the domain has been renewed repeatedly, which costs money every year and is not something abandoned or disposable projects tend to do.
The registrar of record is MarkMonitor Inc..
Registration runs until 9 October 2028.
The domain carries 3 registry locks, which blocks unauthorised transfer or deletion.
| Registered | 9 October 2007 |
|---|---|
| Expires | 9 October 2028 |
| Registrar | MarkMonitor Inc. |
| Registry status | client delete prohibited, client transfer prohibited, client update prohibited |
Where is github.com hosted?
The first address resolves to infrastructure in Frankfurt am Main, Germany.
The network is operated by GitHub, Inc. (AS36459 GitHub, Inc.).
Hosting location describes where the responding server sits, not where the business is. A CDN will report its nearest edge rather than the origin.
What is github.com running on?
No platform, framework or analytics fingerprints were found in the homepage markup of github.com. That usually means hand-written HTML, an uncommon stack, or a page assembled entirely at the edge.
No recognisable platform, framework or analytics fingerprints were found in the homepage markup.
How does the homepage respond?
The server answered with HTTP 200 over HTTPS.
At 62ms to first byte this response is fast for a homepage measured from a single European location.
The HTML alone is 563KB before images, stylesheets or scripts are counted, which is heavy for a document that browsers must parse before anything renders.
The HTML is compressed with gzip.
| Server header | github.com |
|---|---|
| Compression | gzip |
| Page size | 576,659 bytes |
| Declared language | en |
| Mobile viewport | declared |
What does the homepage say about itself?
The title is 61 characters, inside the range that displays without truncation.
The meta description is 186 characters and will be cut short in most result layouts.
All 24 images on the homepage have alt attributes.
| Title | GitHub · Change is constant. GitHub keeps you ahead. · GitHub (61 chars) |
|---|---|
| Meta description | Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity. (186 chars) |
| H1 | The future of building happens together (1 on the page) |
| Canonical | https://github.com |
| Open Graph title | GitHub · Change is constant. GitHub keeps you ahead. |
| Headings / images | 9 H2s, 24 images (0 without alt text) |
Is github.com served over a valid certificate?
The HTTPS certificate is issued by Sectigo Limited and is valid until 2026-11-29, which is 56 days from the date of this check. It covers 2 hostnames.
- github.com
- www.github.com
The certificate has 56 days left to run.
It covers 2 hostnames, so it was issued for this site specifically.
Which security headers does it set?
5 of 6 are set (HSTS, Content Security Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy). Absent: Permissions-Policy.
| Header | Set | Value |
|---|---|---|
| HSTS | yes | max-age=31536000; includeSubdomains; preload |
| Content Security Policy | yes | default-src 'none'; base-uri 'self'; child-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ |
| X-Content-Type-Options | yes | nosniff |
| X-Frame-Options | yes | deny |
| Referrer-Policy | yes | origin-when-cross-origin, strict-origin-when-cross-origin |
| Permissions-Policy | no | — |
How is DNS configured for github.com?
| IP addresses | 140.82.121.4 |
|---|---|
| Reverse DNS | lb-140-82-121-4-fra.github.com |
| Name servers | ns-520.awsdns-01.net, dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns-1283.awsdns-32.org, ns-1707.awsdns-21.co.uk, ns-421.awsdns-52.com |
| Mail (MX) | github-com.mail.protection.outlook.com (pri 0) |
| SPF | v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all |
| TXT records | 24 |
github.com resolves to a single address, so there is no DNS-level redundancy.
Mail is handled by 1 exchanger.
An SPF record is published, giving receiving servers a rule for which hosts may send as this domain.
Reverse DNS resolves to lb-140-82-121-4-fra.github.com, which usually names the hosting provider.
Who runs DNS and mail for github.com?
DNS is operated by Amazon Route 53 rather than self-hosted name servers.
Mail is handled by Microsoft 365.
No AAAA records are published, so the site is reachable over IPv4 only.
What else is worth noting about github.com?
8 of 8 externally hosted scripts carry no subresource integrity hash. If one of those hosts were compromised, the replacement script would run with full access to the page.
2 email addresses appear in the homepage markup, where address-harvesting crawlers will find them.
What has changed on github.com?
This domain has been checked 2 times. Only checks where something actually moved are recorded, so each row below is a real change rather than a repeat measurement.
| Checked | HTTP | Response | IP | Headers |
|---|---|---|---|---|
| 4 Oct 2026 | 200 | 62ms | 140.82.121.4 | 5/6 |
| 4 Oct 2026 | 200 | 63ms | 140.82.121.4 | 5/6 |
Changes recorded at the most recent check:
- name servers: dns4.p08.nsone.net,ns-1283.awsdns-32.org,ns-1707.awsdns-21.co.uk,ns-421.awsdns-52.com → ns-520.awsdns-01.net,dns1.p08.nsone.net,dns2.p08.nsone.net,dns3.p08.nsone.net
Can github.com be spoofed in email?
DMARC is set to quarantine, so mail failing authentication is sent to spam rather than the inbox.
CAA records restrict certificate issuance to 6 named authorities (issue sectigo.com, issuewild digicert.com, issuewild letsencrypt.org, issuewild sectigo.com), so no other CA should be able to issue for this domain.
The zone is not DNSSEC-signed. That is still the norm for most domains, but it means DNS answers cannot be cryptographically verified.
What else does github.com publish?
A security.txt file is published, giving security researchers a documented way to report vulnerabilities. Very few sites bother.
What does robots.txt allow?
robots.txt is 16,739 bytes and names 13 user-agent groups. It does not blanket-disallow general crawlers.
No sitemap is declared in robots.txt.
AI crawler policy
| Crawler | Policy |
|---|---|
| gptbot | allowed |
| claudebot | allowed |
| perplexitybot | allowed |
| bytespider | blocked |
| anthropic-ai | allowed |
No sitemap is declared in robots.txt, so crawlers must discover pages by following links.
AI crawler policy is selective: bytespider blocked, gptbot, claudebot, perplexitybot, anthropic-ai allowed.
What structured data does the homepage publish?
No JSON-LD or microdata was found on the homepage.
What does github.com load from third parties?
The homepage pulls resources from 5 third-party hosts (avatars.githubusercontent.com, github-cloud.s3.amazonaws.com, github.githubassets.com, images.ctfassets.net, user-images.githubusercontent.com). Each one sees the visitor IP and user agent on every page load.
3 cookies are set before any interaction (_gh_sess, _octo, logged_in).
The page links or refers to X/Twitter, LinkedIn, Instagram, YouTube, GitHub.
| Cookie | Secure | HttpOnly | SameSite |
|---|---|---|---|
| _gh_sess | yes | yes | lax |
| _octo | yes | no | lax |
| logged_in | yes | yes | lax |
Does github.com settle on one address?
Plain HTTP redirects to HTTPS, so visitors who type the bare address still land on the secure version.
The www address redirects to https://github.com/, so the site settles on one canonical hostname.
How easily can github.com be crawled?
No readable sitemap was found, so crawlers have to discover every page by following links.
A deliberately invalid URL correctly returns HTTP 404, so missing pages will not be indexed.
What tracking does github.com run?
No analytics or advertising trackers were detected on the homepage of github.com, which is unusual for a commercial site.
How does github.com look when shared?
All five social preview tags are present, so links shared to social platforms and chat apps will render with a title, description and image.
The page declares 26 hreflang alternates (en-us, pt-br, es-AR, es-BO, es-CL, es-CO, es-CR, es-CU, es-DO, es-EC, es-GT, es-HN), so it targets more than one language or region.
How are images, fonts and scripts handled?
24 images on the homepage, 24 of them lazy-loaded (100%).
Modern image formats are in use (62 WebP/AVIF references).
No srcset attributes are used, so every device is served the same image size regardless of screen.
The page pulls 42 external stylesheets and 8 external scripts, with 6 carrying defer or async.
Is github.com accessible and current?
The page uses 14 landmark elements and 217 ARIA attributes.
There are 4 form inputs but only 2 label elements, so some fields may be unlabelled for screen readers.
Can search engines index github.com?
Nothing on the homepage prevents indexing: no noindex is set in the robots meta tag or the X-Robots-Tag header.
The homepage carries 121 internal and 14 external links across 12 outside hosts.
Visible text is only 1.3% of the HTML, which indicates the page is assembled in the browser rather than served as content.
How is github.com delivered?
The HTML is served with Cache-Control: max-age=0, private, must-revalidate.
A web app manifest is declared, so the site is installable as a progressive web app.
The TLS certificate also covers 1 subdomain: www.github.com.
- www.github.com
Frequently asked questions
Does github.com set the usual HTTP security headers?
It sets 5 of 6. The ones not present are: Permissions-Policy.
Does github.com allow AI crawlers?
No — robots.txt blocks bytespider.
Where does this data come from?
Every figure was measured by our own server on 4 October 2026: DNS lookups, one HTTPS request to the homepage, a TLS handshake and a request for robots.txt. No third-party SEO API is involved.
Is any of this traffic or authority data?
No. Traffic, authority and ranking figures cannot be measured by inspecting a domain, only modelled. Everything here is a direct observation.
I own github.com and want this page removed.
Email hello@quikconsolecom.net from an address at the domain and the report will be taken down. It only ever shows what the domain already serves publicly.
Analysed 4 October 2026. Analyse another domain →