github.com

Summary

Registrar

MarkMonitor Inc.

Status

clientDeleteProhibited

Created on

October 9, 2007

Expires on

October 9, 2028

Name servers

ns-520.awsdns-01.net, ns-421.awsdns-52.com, dns4.p08.nsone.net, ns-1283.awsdns-32.org, ns-1707.awsdns-21.co.uk, dns3.p08.nsone.net, dns2.p08.nsone.net, dns1.p08.nsone.net

Mail servers

github-com.mail.protection.outlook.com

DMARC

Quarantine

SPF

Soft

DKIM

9 keys found

Website

See the website

Spoofing protection (DMARC)

DMARC tells mail servers what to do with an e-mail that claims to come from github.com but fails SPF and DKIM checks.

Policy

Quarantine

Subdomain policy

Reject

Messages covered

100%

DKIM alignment

Relaxed

SPF alignment

Relaxed

Aggregate reports

[email protected]

Failure reports

[email protected]

Record

v=DMARC1; p=quarantine; sp=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1

Authorized senders (SPF)

SPF lists the servers allowed to send e-mails for github.com.

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

E-mail signing (DKIM)

DKIM keys published by github.com under the most common selectors. Other keys may exist under selectors specific to each sending service.

RSA keys shorter than 2048 bits, called short keys, are discouraged: they are easier to break.

MX, SPF, DKIM and DMARC: the e-mail records

Four DNS records make a domain's e-mail work. MX says where e-mails sent to github.com arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from github.com was really sent by this domain, which protects it against spoofing.

github.com  MX  10 mx1.github.com.
github.com  MX  20 mx2.github.com.

github.com  TXT  "v=spf1 mx include:_spf.google.com ip4:192.0.2.10 -all"

google._domainkey.github.com  TXT  "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA…"

_dmarc.github.com  TXT  "v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r"

DNS records of github.com

Related IP addresses

IPv4 addresses used by github.com: website, name servers, mail servers and senders authorized by SPF.

WHOIS of the domain github.com

Domain Name: GITHUB.COM
   Registry Domain ID: 1264983250_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.markmonitor.com
   Registrar URL: http://www.markmonitor.com
   Updated Date: 2026-09-07T09:22:52Z
   Creation Date: 2007-10-09T18:20:50Z
   Registry Expiry Date: 2028-10-09T18:20:50Z
   Registrar: MarkMonitor Inc.
   Registrar IANA ID: 292
   Registrar Abuse Contact Email: [email protected]
   Registrar Abuse Contact Phone: +1.2086851750
   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
   Name Server: DNS1.P08.NSONE.NET
   Name Server: DNS2.P08.NSONE.NET
   Name Server: DNS3.P08.NSONE.NET
   Name Server: DNS4.P08.NSONE.NET
   Name Server: NS-1283.AWSDNS-32.ORG
   Name Server: NS-1707.AWSDNS-21.CO.UK
   Name Server: NS-421.AWSDNS-52.COM
   Name Server: NS-520.AWSDNS-01.NET
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-09-30T23:29:58Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

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