Yes — xundns.com has IPv6.

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

This is a saved measurement from 2026-11-01 12:58 UTC. Check xundns.com live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
xundns.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2001:df1:7880:101::268 answers · 80✓ 2001:df1:7880:100::1ee answers · 80
yes
www over IPv6
www.xundns.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2001:df1:7880:100::1ee answers · 80✓ 2001:df1:7880:101::268 answers · 80
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx1.feishu.cn ✗mx3.feishu.cn ✗mx2.feishu.cn ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
u2.xundns.com ✓u1.xundns.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
xundns.com didn't complete an HTTPS request over IPv6 (ECONNREFUSED).
https://xundns.com/ via 2001:df1:7880:101::268 · ECONNREFUSED
?

What's keeping xundns.com from an A

  1. Mail servers without IPv6
    mx1.feishu.cn, mx3.feishu.cn, mx2.feishu.cn have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

xundns.com  Has IPv6

Alias of307527401113129984.url.xunurl.com
A (IPv4)83.229.124.96
154.9.25.113
38.207.179.237
AAAA (IPv6)2001:df1:7880:101::268
2001:df1:7880:100::1ee

www.xundns.com  Has IPv6

Alias of307527339880223744.url.xunurl.com
A (IPv4)38.207.179.237
83.229.124.96
154.9.25.113
AAAA (IPv6)2001:df1:7880:100::1ee
2001:df1:7880:101::268

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/NkJxs-XtHJ · How we measure

Checked 2026-11-01 12:58:08 UTC. Full DNS report: dns.pizza/domain/xundns.com · JSON: /api/v1/xundns.com