Yes — www.gov.uk has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
www.gov.uk has 4 IPv6 addresses and answers on every one we tested.
✓ 2a04:4e42:600::144 answers · 443✓ 2a04:4e42::144 answers · 443✓ 2a04:4e42:200::144 answers · 443✓ 2a04:4e42:400::144 answers · 443
yes
Mail servers (MX) have IPv6
No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.		yes
Nameservers have IPv6
8 of 8 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
nsa.nic.uk ✓nsb.nic.uk ✓nsc.nic.uk ✓nsd.nic.uk ✓dns1.nic.uk ✓dns2.nic.uk ✓dns3.nic.uk ✓dns4.nic.uk ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://www.gov.uk/ via 2a04:4e42:600::144 → 200
works
 Load www.gov.uk over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

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

Check again

www.gov.uk  Has IPv6

Alias ofwww-cdn.production.govuk.service.gov.uk → www-gov-uk.map.fastly.net
A (IPv4)151.101.128.144
151.101.192.144
151.101.0.144
151.101.64.144
AAAA (IPv6)2a04:4e42:600::144
2a04:4e42::144
2a04:4e42:200::144
2a04:4e42:400::144

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/Uu_aYdo2ah · How we measure

Checked 2026-10-30 19:04:33 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/www.gov.uk · JSON: /api/v1/www.gov.uk