`subspace.kernel.org`

CNAME	`korg-listserv-1-mail-lb-d609b0ffa8ee7369.elb.us-west-2.amazonaws.com`
DNSSEC	⚠️ Not signed
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`
A	44.239.28.192^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
A	52.37.2.248^{🇺🇸 Amazon52.36.0.0/14 EC2 PDX prefix}

`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=2015014807

WOT: SAFE (95/100)
rank #453 globally
rank #60 in the tld
WOT: SAFE (95/100)
📈 Tranco rank: #1,285

Subdomains

smtp.subspace.kernel.org

Same first word

Similar names

DNS History

1 record (1 active, 0 former)

●CNAMEkorg-listserv-1-mail-lb-d609b0ffa8ee7369.elb.us-west-2.amazonaws.com2026-04-09 → 2026-07-03 · 2 obs

● 2026-04-09 00:51:32
● 2026-07-03 13:21:02

🔍 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	ns51.constellix.net, ns21.constellix.com, ns11.constellix.com, ns31.constellix.com...	-

✅ Authoritative Response

Server:96.45.80.1

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kernel.org (unsigned zone)

⏱️ Timing

Total: 831ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`korg-listserv-1-mail-lb-d609b0ffa8ee7369`

Analysis

Hierarchy

subspace.kernel.org is the parent zone for smtp.subspace.kernel.org.

IP Addresses

The hostname subspace.kernel.org resolves to three IP addresses: 44.238.234.78, 44.239.28.192 and 52.37.2.248.

Among the host names that share IP numbers with subspace.kernel.org are smtp.subspace.kernel.org, korg-listserv-1-mail-lb-d609b0ffa8ee7369.elb.us-west-2.amazonaws.com, vger.kernel.org and two others.

subspace.kernel.org - robtex.com