Yes — icloud.com has IPv6.

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

B
IPv6 readiness
The website works over IPv6; mail doesn't fully.
Website over IPv6
icloud.com has an AAAA record and answers on it.		yes
www over IPv6
www.icloud.com has an AAAA record and answers on it.		yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx01.mail.icloud.com ✗mx02.mail.icloud.com ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
a.ns.apple.com ✓b.ns.apple.com ✓c.ns.apple.com ✓d.ns.apple.com ✓
yes
 Load icloud.com over IPv6 from up to six other places — a second opinion.

What's keeping icloud.com from an A

  1. Mail servers without IPv6
    mx01.mail.icloud.com, mx02.mail.icloud.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

icloud.com  Has IPv6

A (IPv4)17.253.144.10
AAAA (IPv6)2620:149:af0::10

www.icloud.com  Has IPv6

Alias ofwww-cdn.icloud.com.akadns.net → www-icloud-row.v.aaplimg.com → www.icloud.com.edgesuite.net → a1317.dscb.akamai.net
A (IPv4)23.207.202.172
23.207.202.203
AAAA (IPv6)2600:1408:5400:34::1703:4b4b
2600:1408:5400:34::1703:4b53

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

Checked 2026-10-30 14:52:01 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/icloud.com · JSON: /api/v1/icloud.com