Yes — yahoo.com has IPv6.

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

This is a saved measurement from 2026-10-30 19:45 UTC. Check yahoo.com live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
yahoo.com has 4 IPv6 addresses and answers on every one we tested (2 more not tested).
✓ 2001:4998:124:1507::f000 answers · 443✓ 2001:4998:44:3507::8001 answers · 443✓ 2001:4998:124:1507::f001 answers · 443✓ 2001:4998:24:120d::1:1 answers · 443– 2001:4998:24:120d::1:0 not tested– 2001:4998:44:3507::8000 not tested
yes
www over IPv6
www.yahoo.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2001:4998:14:800::1001 answers · 443✓ 2001:4998:14:800::1000 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mta5.am0.yahoodns.net ✗mta7.am0.yahoodns.net ✗mta6.am0.yahoodns.net ✗
no
Nameservers have IPv6
4 of 5 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns4.yahoo.com ✗ns3.yahoo.com ✓ns2.yahoo.com ✓ns5.yahoo.com ✓ns1.yahoo.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://yahoo.com/ via 2001:4998:124:1507::f000 → 301https://www.yahoo.com/ via 2001:4998:14:800::1001 → 200
works

What's keeping yahoo.com from an A

  1. Mail servers without IPv6
    mta5.am0.yahoodns.net, mta7.am0.yahoodns.net, mta6.am0.yahoodns.net 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

yahoo.com  Has IPv6

A (IPv4)74.6.231.21
98.137.11.163
98.137.11.164
74.6.143.25
74.6.143.26
74.6.231.20
AAAA (IPv6)2001:4998:124:1507::f000
2001:4998:44:3507::8001
2001:4998:124:1507::f001
2001:4998:24:120d::1:1
2001:4998:24:120d::1:0
2001:4998:44:3507::8000

www.yahoo.com  Has IPv6

Alias ofme-ycpi-cf-www.g06.yahoodns.net
A (IPv4)69.147.92.12
69.147.92.11
AAAA (IPv6)2001:4998:14:800::1001
2001:4998:14:800::1000

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/6n6D1zFezu · How we measure

Checked 2026-10-30 19:45:18 UTC. Full DNS report: dns.pizza/domain/yahoo.com · JSON: /api/v1/yahoo.com