linux.kernel.org - dns.ninja

`linux.kernel.org`

DNSSEC	⚠️ Not signed
A	139.178.84.217^{🇺🇸 PACKET139.178.80.0/21 Equinix Services, Inc.}
MX	`smtp.subspace.kernel.org` ⭐
		A	44.238.234.78^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-238-234-78.us-west-2.compute.amazonaws.com`
TXT	`v=spf1 include:_listspf.kernel.org ~all`

`kernel.org`

	DNSSEC	⚠️ Not signed
	A	2600:3c04:e001:324:0:1991:8:25^{🇨🇦 AKAMAI-LINODE-AP2600:3c04::/32 Akamai Technologies}
	A	172.105.4.254^{🇨🇦 AKAMAI-LINODE-AP172.105.0.0/19 Akamai Technologies}
	NS	`ns11.constellix.com` ⭐
	NS	`ns21.constellix.com`
	NS	`ns31.constellix.com`
	NS	`ns41.constellix.net`
	NS	`ns51.constellix.net`
	NS	`ns61.constellix.net`
	MX	`smtp1.kernel.org` ⭐
	MX	`smtp2.kernel.org` ⭐
	MX	`smtp3.kernel.org` ⭐
	TXT	`v=spf1 include:_spf.kernel.org ~all`
	TXT	`google-site-verification=nb4Wx5xBQM3b-a3OV2KSlPL786714Y7M6GfBtJf1opQ`
	SOA	`ns11.constellix.com`dns@constellix.com serial=2015014884

WOT: SAFE (67/100)
rank #441 globally
rank #59 in the tld

kernel.org

The official home of the Linux kernel project, hosting the source code, release archives, and infrastructure used to develop and distribute the Linux kernel. It is operated by the Linux Kernel Organization, a nonprofit that supports kernel development infrastructure on behalf of the community and Linus Torvalds.

Key facts

Owner / operator: The Linux Kernel Organization, Inc. (a nonprofit set up to support kernel.org infrastructure)
TLD:.org— gTLD
Primary purpose: Distribution of Linux kernel source code, git repositories, and release tarballs
Status: active

History

Year	Event
1994	Domain registered to provide FTP distribution of Linux kernel sources
2011	Site infrastructure compromised in a security breach; systems taken offline for investigation
2012	Services restored with hardened infrastructure and mandatory signed-commit/PGP verification for kernel developers

Related domains

git.kernel.org— official Git repository hosting for the Linux kernel
www.kernel.org— main website with release information and download links

WOT: SAFE (95/100)
📈 Tranco rank: #1,266

PTR for

199.19.145.198.in-addr.arpa

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DNS History

5 records (2 active, 3 former)

○MXmail.kernel.org2015-06-13 → 2016-10-09 · 4 obs

● 2015-06-13 20:55:44
● 2016-10-09 21:20:18
○ 2021-06-30 00:44:10
○ 2026-07-23 22:36:04

●MXsmtp.subspace.kernel.org2021-06-30 → 2026-07-23 · 3 obs

○ 2016-10-09 21:20:18
● 2021-06-30 00:44:10
● 2026-07-23 22:36:04

●A139.178.84.2172026-03-11 → 2026-07-23 · 3 obs

○ 2021-11-27 02:47:22
● 2026-03-11 10:42:12
● 2026-07-23 22:36:04

○A198.145.29.1462015-06-13 → 2016-10-09 · 4 obs

● 2015-06-13 20:55:44
● 2016-10-09 21:20:18
○ 2021-06-30 00:44:10
○ 2026-07-23 22:36:04

○A198.145.29.832021-06-30 → 2021-11-27 · 5 obs

○ 2016-10-09 21:20:18
● 2021-06-30 00:44:10
● 2021-11-27 02:47:22
○ 2026-03-11 10:42:12
○ 2026-07-23 22:36:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
kernel.org	ns21.constellix.com, ns61.constellix.net, ns11.constellix.com, ns51.constellix.net...	-

✅ Authoritative Response

Server:43.247.170.1

NS records: ns21.constellix.com, ns61.constellix.net, ns11.constellix.com, ns51.constellix.net, ns31.constellix.com, ns41.constellix.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kernel.org (unsigned zone)

⏱️ Timing

Total: 697ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`139.178.84.217`
MX	1	`smtp.subspace.kernel.org (pri: 10)`
TXT	1	`v=spf1 include:_listspf.kernel.org ~all`

Analysis

IP Addresses

linux.kernel.org points to a single IP number: 139.178.84.217.

There are other host names — android.kernel.org among them — that share IP numbers with linux.kernel.org.

Mail Servers

linux.kernel.org has one mail server: smtp.subspace.kernel.org.

Like android.kernel.org and vger.kernel.org, linux.kernel.org has the same mail server arrangement as several other domains.

smtp.subspace.kernel.org has exactly one IP number: 44.238.234.78.