`1.smtp.github.com`

DNSSEC	⚠️ Not signed
A	192.30.254.192^{🇺🇸 GITHUB192.30.254.0/24 GitHub Build software better, together. https://github.com \|\| https://github.com/about}
		PTR	`out-9.smtp.github.com`

`smtp.github.com`

	DNSSEC	⚠️ Not signed
	A	140.82.112.31^{🇺🇸 GITHUB140.82.112.0/24 GitHub}
	A	140.82.112.32^{🇺🇸 GITHUB140.82.112.0/24 GitHub}
	A	140.82.113.31^{🇺🇸 GITHUB140.82.113.0/24 GitHub}
	A	140.82.113.32^{🇺🇸 GITHUB140.82.113.0/24 GitHub}
	A	140.82.114.31^{🇺🇸 GITHUB140.82.114.0/24 GitHub}
	A	140.82.114.32^{🇺🇸 GITHUB140.82.114.0/24 GitHub}

WOT: SAFE (94/100)
WOT: SAFE (94/100)

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DNS History

1 record (1 active, 0 former)

●A192.30.254.1922018-08-05 → 2026-04-12 · 2 obs

● 2018-08-05 00:59:48
● 2026-04-12 21:07:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.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...	1 record

✅ Authoritative Response

Server:205.251.194.8

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for github.com (unsigned zone)

⏱️ Timing

Total: 320ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.30.254.192`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-421.awsdns-52.com)

Analysis

IP Addresses

1.smtp.github.com points to a single IP address: 192.30.254.192.

Other host names, for instance out-9.smtp.github.com, share IP numbers with 1.smtp.github.com.

1.smtp.github.com - robtex.com

1.smtp.github.com

smtp.github.com