Yes — gnu.org has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

This is a saved measurement from 2026-10-31 11:10 UTC. Check gnu.org live now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
gnu.org has an AAAA record and answers on it.
✓ 2001:470:142:5::116 answers · 443
yes
www over IPv6
www.gnu.org has an AAAA record and answers on it.
✓ 2001:470:142:5::116 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
eggs.gnu.org ✓
yes
Nameservers have IPv6
3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns4.gnu.org ✓ns1.gnu.org ✓ns2.gnu.org ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://gnu.org/ via 2001:470:142:5::116 → 301https://www.gnu.org/ via 2001:470:142:5::116 → 200
works

Nothing keeping you from an A

  1. Nothing to fix
    Show it off: add the badge to your README.
    [![IPv6](https://aaaa.bot/badge/gnu.org.svg)](https://aaaa.bot/gnu.org)

Check again

gnu.org  Has IPv6

A (IPv4)209.51.188.116
AAAA (IPv6)2001:470:142:5::116

www.gnu.org  Has IPv6

A (IPv4)209.51.188.116
AAAA (IPv6)2001:470:142:5::116

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

 Permanent link: aaaa.bot/r/f6_OmZ-qCf · How we measure

Checked 2026-10-31 11:10:06 UTC. Full DNS report: dns.pizza/domain/gnu.org · JSON: /api/v1/gnu.org