Yes — www.gov.cn has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
www.gov.cn has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2407:2440:2d::13 answers · 443✓ 2407:2440:2d::14 answers · 443✓ 2407:2440:2d::b answers · 443✓ 2407:2440:2d::c answers · 443– 2407:2440:2d::d not tested– 2407:2440:2d::e not tested– 2407:2440:2d::f not tested– 2407:2440:2d::10 not tested
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx.mail.gov.cn ✗
no
Nameservers have IPv6
2 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1.cdns.cn ✓ns3.cdns.cn ✗ns2.cdns.cn ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://www.gov.cn/ via 2407:2440:2d::13 → 200
works
 Load www.gov.cn over IPv6 from up to six other places — a second opinion.

What's keeping www.gov.cn from an A

  1. Mail servers without IPv6
    mx.mail.gov.cn has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

www.gov.cn  Has IPv6

Alias ofwww.gov.cn.bsgslb.cn → zclfg-pro.v.bsgslb.cn
A (IPv4)156.225.111.237
156.225.111.238
156.225.111.236
AAAA (IPv6)2407:2440:2d::13
2407:2440:2d::14
2407:2440:2d::b
2407:2440:2d::c
2407:2440:2d::d
2407:2440:2d::e
2407:2440:2d::f
2407:2440:2d::10

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/tDzRqhNChW · How we measure

Checked 2026-11-02 10:44:39 UTC. Full DNS report: dns.pizza/domain/www.gov.cn · JSON: /api/v1/www.gov.cn