Yes — youku.com 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
youku.com has 4 IPv6 addresses and answers on every one we tested.
✓ 2408:4001:f10::fd answers · 443✓ 2408:4001:f10::8 answers · 443✓ 2408:4001:f00::3a answers · 443✓ 2408:4001:f00::1af answers · 443
yes
www over IPv6
www.youku.com has an AAAA record and answers on it.
✓ 2408:4001:f10::8 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx2.youku.com ✗mx1.youku.com ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
dns4.youku.com ✓dns3.youku.com ✓dns2.youku.com ✓dns1.youku.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://youku.com/ via 2408:4001:f10::fd → 200
works
 Load youku.com over IPv6 from up to six other places — a second opinion.

What's keeping youku.com from an A

  1. Mail servers without IPv6
    mx2.youku.com, mx1.youku.com 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

youku.com  Has IPv6

A (IPv4)106.11.35.97
AAAA (IPv6)2408:4001:f10::fd
2408:4001:f10::8
2408:4001:f00::3a
2408:4001:f00::1af

www.youku.com  Has IPv6

Alias ofipv6-aserver-heyi.m.taobao.com → ipv6-aserver-heyi.m.taobao.com.gds.alibabadns.com
A (IPv4)47.246.99.161
AAAA (IPv6)2408:4001:f10::8

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/ejqX_QFgss · How we measure

Checked 2026-10-31 06:04:36 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/youku.com · JSON: /api/v1/youku.com