Audit: github.com

Audited on 2 Sep 2026

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Needs attention

  • Domain expires in 36 days Confirm auto-renew is on and the billing card is valid.
75
overall score
On-page SEO
0
Crawlability
100
TLS & security
100
Network
83
Email
90
DNS
75

The site is up · responded in 124 ms

  • Reachable 0% of the last 24 hours
  • Last time we couldn't reach it: 6d ago
  • Outages cost you traffic and rankings while they last, and they rarely happen while you are watching.
Live status: GitHub → Email me if it goes down →

On-page SEO

0/100
  • ? Page indexing The page was not fetched
  • ? On-page markup The page was not fetched

Crawlability

100/100
  • ✓ robots.txt present + valid Parsed cleanly · 0 sitemap(s) declared
  • ? Sitemap.xml Could not check /sitemap.xml

TLS & security

100/100
  • ✓ TLS handshake succeeds
  • ✓ Certificate not expiring soon 69 days left

Network

83/100
  • ✓ Hostname resolves to an A record 140.82.112.3
  • ! Server header does not leak version

Email

90/100
  • ✓ MX records valid + reachable
  • ✓ SPF record present 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
  • ✓ DMARC record present
  • ! DMARC policy enforced p=quarantine
  • ✓ DKIM key published selector=google, ~2352-bit

DNS

75/100
  • ✓ A records resolve
  • ✓ NS records present
  • ✓ MX records present
  • ✗ DNS resolvers agree on the same A record 36% of 12 resolvers agree
  • ! Domain registration not expiring soon 17 days left
  • ✓ Domain is established 18y 10m 23d (2007-10-09)

What changed

Nothing has changed on github.com since we started watching it.

Certificates expire, DNS gets edited, a header goes missing in a deploy. Prove the domain is yours and we watch it on a schedule — free — and email you the moment something moves, so you hear it from us instead of from a customer.

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Subdomains discovered 🔒 Pro

118 via Certificate Transparency

We found 118 subdomains for github.com via Certificate Transparency logs.

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Tech stack detected

1 technology · Pro: track changes over time →

Signature-based identification from the public homepage. Pattern set is fixed; nothing is sent to third parties.

Server

  • Header value github.com

A certificate that expires on Tuesday should not wait until Friday. Prove a domain is yours and we check it free, once a week, emailing you anything that changed. Pro checks it once a day, looks at every host on the domain, and keeps 365 days of history — so you hear about a problem in hours rather than days.

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