emails.github.com - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`emails.github.com`

CNAME	`mkto-sj180011.com`
DNSSEC	⚠️ Not signed
A	104.17.70.206^{Cloudflare104.17.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.17.71.206^{Cloudflare104.17.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.17.72.206^{Cloudflare104.17.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.17.73.206^{Cloudflare104.17.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.17.74.206^{Cloudflare104.17.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns1.marketo.com` ⭐
		A	208.77.136.240^{🇺🇸 Adobe208.77.136.0/22 VA5}
NS	`ns2.mktdns.com`
		A	192.28.164.191^{🇺🇸 Adobe192.28.164.0/23}
NS	`ns3.marketo.co.uk` ⚠️ Not in parent delegation
		A	130.248.246.54^{🇺🇸 Adobe130.248.244.0/22 GBR2}
SOA	`ns1.marketo.com`ops@localhost 2026-05-21 #1

`github.com`

	DNSSEC	⚠️ Not signed
	A	140.82.121.4^{🇩🇪 GITHUB140.82.121.0/24}
	NS	`dns1.p08.nsone.net` ⭐
	NS	`dns2.p08.nsone.net`
	NS	`dns3.p08.nsone.net`
	NS	`dns4.p08.nsone.net`
	NS	`ns-1283.awsdns-32.org`
	NS	`ns-1707.awsdns-21.co.uk`
	NS	`ns-421.awsdns-52.com`
	NS	`ns-520.awsdns-01.net`
	MX	`github-com.mail.protection.outlook.com` ⭐
	TXT	`00Dd0000000hHE0=1TBKg000000TN2r`
	TXT	`MS=6BF03E6AF5CB689E315FB6199603BABF2C88D805`
	TXT	`MS=ms44452932`
	TXT	`MS=ms58704441`
	TXT	`TAILSCALE-xOzoDvFUzZr5YYVCQFuD`
	TXT	`adobe-idp-site-verification=b92c9e999aef825edc36e0a3d847d2dbad5b2fc0e05c79ddd...`
	TXT	`anthropic-domain-verification-4az7qn=if8YWuRRqwLycGJDooumzHtxm`
	TXT	`apple-domain-verification=RyQhdzTl6Z6x8ZP4`
	TXT	`atlassian-domain-verification=jjgw98AKv2aeoYFxiL/VFaoyPkn3undEssTRuMg6C/3Fp/i...`
	TXT	`calendly-site-verification=at0DQARi7IZvJtXQAWhMqpmIzpvoBNF7aam5VKKxP`
	TXT	`docusign=087098e3-3d46-47b7-9b4e-8a23028154cd`
	TXT	`facebook-domain-verification=39xu4jzl7roi7x0n93ldkxjiaarx50`
	TXT	`google-site-verification=82Le34Flgtd15ojYhHlGF_6g72muSjamlMVThBOJpks`
	TXT	`google-site-verification=UTM-3akMgubp6tQtgEuAkYNYLyYAvpTnnSrDMWoDR3o`
	TXT	`jamf-site-verification=XtaPNIYghF_e_xRDI8CjgQ`
	TXT	`krisp-domain-verification=ZlyiK7XLhnaoUQb2hpak1PLY7dFkl1WE`
	TXT	`loom-site-verification=f3787154f1154b7880e720a511ea664d`
	TXT	`miro-verification=d2e174fdb00c71e0bcf58f8e58c3da2dd80dcfa9`
	TXT	`openai-domain-verification=dv-3nh33eQwdkotMIAzLrIDVZo1`
	TXT	`serval-domain-verification-ydryhj=qbkiEakpwEpTvHh5fIiCqtaue`
	TXT	`shopify-verification-code=t1YPwcmvnxZyBycaCpk1MPyWoFs72o`
	TXT	`stripe-verification=f88ef17321660a01bab1660454192e014defa29ba7b8de9633c69d6b4...`
	TXT	`v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblo...`
	SOA	`dns1.p08.nsone.net`hostmaster@nsone.net serial=1656468023

WOT: SAFE (64/100)
rank #10 globally
rank #10 in the tld

github.com

github.com is the primary domain of GitHub, a code hosting platform operated by Microsoft.

Key facts

Owner / operator: Microsoft (via GitHub, Inc.)
TLD:.com— gTLD
Primary purpose: hosting service for git repositories and collaborative software development
Status: active

History

Year	Event
2008	GitHub launched, domain registered for the service
2012	GitHub announced reaching 3 million repositories
2018	Microsoft acquired GitHub for $7.5 billion (acquisition completed)

Related domains

github.io– GitHub Pages static site hosting

🔒 HSTS Preload (+subdomains)
Semrush Rank:#148 Keywords:7,571,859 Traffic:15,919,465/mo
WOT: SAFE (79/100)
📈 Tranco rank: #30

GitHub is the world's largest source code hosting platform and developer community, founded in 2008 and acquired by Microsoft in 2018 for $7.5 billion. With over 100 million developers and 400 million repositories, GitHub has become the central hub for open-source development and enterprise software collaboration.

The platform pioneered social coding features like pull requests, issues, and forking that have become industry standards. GitHub hosts the source code for countless major projects including Linux, React, TensorFlow, and VS Code. The company also provides GitHub Actions for CI/CD, GitHub Pages for static hosting, Copilot for AI-assisted coding, and comprehensive security scanning.

GitHub's infrastructure runs on Microsoft Azure, having migrated from its original Rackspace-based setup. The platform uses a globally distributed architecture with multiple data centers for redundancy. GitHub experienced a famous 2018 DDoS attack that peaked at 1.35 Tbps, the largest recorded at that time, which they mitigated using Akamai Prolexic.

DNS for github.com is managed through multiple providers for resilience, with authoritative nameservers including dns1-4.p08.nsone.net (NS1). The site uses advanced DNS configurations including DNSSEC and CAA records for certificate authority authorization. GitHub's global CDN delivers assets from edge locations worldwide for optimal performance.

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DNS History

1 record (1 active, 0 former)

●CNAMEmkto-sj180011.com2026-03-08 → 2026-08-19 · 2 obs

● 2026-03-08 03:06:52
● 2026-08-19 06:41:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
github.com	ns-520.awsdns-01.net, ns-421.awsdns-52.com, ns-1707.awsdns-21.co.uk, ns-1283.awsdns-32.org...	2 records
github.com	dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net...	-
github.com	dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net...	-
github.com	dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net...	-

✅ Authoritative Response

Server:198.51.45.8

NS records: 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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for github.com (unsigned zone)

⏱️ Timing

Total: 1067ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mkto-sj180011.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-421.awsdns-52.com, ns-421.awsdns-52.com)

Analysis

IP Addresses

emails.github.com points to five IP addresses: 104.17.70.206, 104.17.71.206, 104.17.72.206 and two more

mkto-nld1040117.com, mkto-ab320072.com, mkto-sj260147.com and two other host names share IP numbers with emails.github.com.

Name Servers

emails.github.com is delegated to three name servers: ns1.marketo.com, ns2.mktdns.com and ns3.marketo.co.uk.

emails.github.com shares at least some of its name servers with other domains, including mkto-nld1040056.com, mkto-sji0236.com, mkto-sj030144.com and two others.

ns1.marketo.com, ns2.mktdns.com and ns3.marketo.co.uk each resolve to a single IP address: ns1.marketo.com resolves to 208.77.136.240, ns2.mktdns.com resolves to 192.28.164.191 and ns3.marketo.co.uk resolves to 130.248.246.54.