Querying every nameserver directly — this takes a few seconds.

github.com — snapshot from 2026-08-17 · Inspect My DNS

Snapshot captured 2026-08-17 09:38 UTC. This page never changes. DNS may well have changed since.

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github.com

History

Stored result from 3 hours ago · Re-check for a live scan2026-08-17 09:38:20 UTCRaw JSON

github.com scores 96 out of 100, with one check failing and 1 more raising a warning.

Nameservers agree on the SOA serial: Serial drift: 2 different serials across 16 servers.
One check could not be measured from our network and is excluded from the score.

Registrar

MarkMonitor Inc.

Confident

RDAP record at the registry
IANA registrar ID 292

DNS

NS1

Confident

nameserver dns1.p08.nsone.net
nameserver dns2.p08.nsone.net

Microsoft 365

Confident

MX github-com.mail.protection.outlook.com

Hosting

GitHub Pages

Confident

HTTP header x-github-request-id: D5AE:157E53:A649CB:EB08E1:6A82D685

96/ 100

1failed
1warning
33passed
7notes
1not measured

Registration

Registrant contact details are redacted for almost every domain under GDPR. The registrar and its abuse contact below are the fields that actually get you to a human.

Registrar: MarkMonitor Inc.
Abuse contact: [email protected]
Abuse phone: tel:+1.2086851750
Registered: 2007-10-09
Expires: 2026-10-09
Last changed: 2024-09-07
IANA registrar ID: 292

Nameservers at the registry

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
ns-520.awsdns-01.net

Status codes

client delete prohibitedDeletion is locked at your registrar, so the domain cannot be accidentally (or maliciously) deleted.
client transfer prohibitedTransfer lock is on — you must unlock this at your registrar before the domain can move to another one. This is usually a good thing: it is what stops someone else transferring your domain away.
client update prohibitedUpdates are locked at your registrar — nameserver and contact changes will be refused until you remove the lock in your registrar account.

Network the website sits on

Address: 140.82.114.3
Netblock: 140.82.112.0/20
Owner: GitHub, Inc.
Network name: GITHU
Abuse contact: [email protected]

Scanned in 3.0s using 236 DNS queries. This report is public for anyone who has the link — see About for what that means and how to opt out.

Who runs what

DelegationWhat the registry has on file6 checks

NameserversHow each server actually behaves1 failed

Registration

SOAZone metadata and timers5 checks

Mail deliveryMX records and mail servers1 not measured

Mail authenticationSPF, DKIM, DMARC and transport security1 warning

Web & TLSAddress records and certificates5 checks

ReputationBlacklist status1 checks

RegistrationRegistrar records3 checks