`out-21.smtp.github.com`

DNSSEC	⚠️ Not signed
A	192.30.252.204^{🇺🇸 GITHUB192.30.252.0/24 GitHub Build software better, together. https://github.com \|\| https://github.com/about}
		PTR	`out-21.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)

PTR for

204.252.30.192.in-addr.arpa

DNS History

1 record (1 active, 0 former)

●A192.30.252.2042019-12-19 → 2026-04-12 · 2 obs

● 2019-12-19 04:52:56
● 2026-04-12 21:15:36

🔍 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:198.51.45.72

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: 333ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.30.252.204`

📌 Glue Records Collected

Total: 1

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

Analysis

IP Addresses

out-21.smtp.github.com points to a single IP number: 192.30.252.204.

out-21.smtp.github.com - robtex.com