rt.gnu.org - dns.ninja

`rt.gnu.org`

DNSSEC	⚠️ Not signed
A	2001:470:142:5::47^{🇺🇸 FSF2001:470:142::/48 NET-2001-470-142---48-AS22989}
		PTR	`rt2p.fsf.org`
A	209.51.188.47^{🇺🇸 FSF209.51.188.0/24 NET-209-51-188-0-24-AS22989}
TXT	`v=spf1 redirect=gnu.org`

`gnu.org`

	DNSSEC	⚠️ Not signed
	A	2001:470:142:5::116^{🇺🇸 FSF2001:470:142::/48 NET-2001-470-142---48-AS22989}
	A	209.51.188.116^{🇺🇸 FSF209.51.188.0/24 NET-209-51-188-0-24-AS22989}
	NS	`ns1.gnu.org` ⭐
	NS	`ns2.gnu.org`
	NS	`ns4.gnu.org`
	MX	`eggs.gnu.org` ⭐
	TXT	`v=spf1 ip4:209.51.188.0/24 ip6:2001:470:142::/48 ip4:18.4.89.21 ip4:15.204.20...`
	SOA	`ns1.gnu.org`hostmaster@gnu.org 2026-05-18 #9

WOT: SAFE (95/100)
rank #111 globally
rank #12 in the tld
Semrush Rank:#13,643 Keywords:64,130 Traffic:167,161/mo
WOT: SAFE (95/100)
📈 Tranco rank: #336

GNU Project

gnu.org is the official website of the GNU Project, a free software operating system founded by Richard Stallman in January 1984. The name is a recursive acronym: "GNU's Not Unix." GNU provides a complete Unix-like operating system composed entirely of free software that respects users' freedom—the right to run, study, modify, and redistribute software.

Key Projects

GNU/Linux — The most widely used form of GNU, combining GNU software with the Linux kernel
GCC — The GNU Compiler Collection, a cornerstone of open-source development
GNU Emacs — Extensible, self-documenting text editor
GNU Hurd — GNU's own microkernel, development started in 1990

The project is supported by the Free Software Foundation (FSF), which advocates for software freedom worldwide.

Hosting & Infrastructure

Service	Details
Web/Mail	Self-hosted by FSF in the USA (209.51.188.0/24)
Nameservers	OVH (Canada & France): ns1.gnu.org, ns2.gnu.org, ns4.gnu.org
Mail Server	eggs.gnu.org (209.51.188.92)
DNSSEC	Not signed

Tranco Rank: #497 globally, #12 among .org domains

PTR for

212.28-208.156.94.74.in-addr.arpa

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DNS History

4 records (2 active, 2 former)

●A2001:470:142:5::472026-02-16 → 2026-06-14 · 3 obs

○ 2021-11-12 06:24:30
● 2026-02-16 11:01:22
● 2026-06-14 02:22:14

●A209.51.188.472026-02-16 → 2026-06-14 · 3 obs

○ 2021-11-12 06:24:30
● 2026-02-16 11:01:22
● 2026-06-14 02:22:14

○A74.94.156.2122021-11-12 → 2021-11-12 · 4 obs

○ 2017-01-13 18:44:54
● 2021-11-12 06:24:30
○ 2026-02-16 11:01:22
○ 2026-06-14 02:22:14

○A74.94.156.2132015-06-05 → 2017-01-13 · 4 obs

● 2015-06-05 04:07:26
● 2017-01-13 18:44:54
○ 2021-11-12 06:24:30
○ 2026-06-14 02:22:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
gnu.org	ns2.gnu.org, ns1.gnu.org, ns4.gnu.org	6 records

✅ Authoritative Response

Server:192.99.35.98

NS records: ns2.gnu.org, ns1.gnu.org, ns4.gnu.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gnu.org (unsigned zone)

⏱️ Timing

Total: 258ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`209.51.188.47`
AAAA	1	`2001:470:142:5::47`
TXT	1	`v=spf1 redirect=gnu.org`

📌 Glue Records Collected

Total: 6

In-bailiwick: 6 (ns1.gnu.org, ns2.gnu.org, ns4.gnu.org...)

Analysis

IP Addresses

rt.gnu.org points to two IP numbers: 209.51.188.47 and 2001:470:142:5::47.

Host names like rt2p.gnu.org are further examples that share IP numbers with rt.gnu.org.