Yes — microsoft365suite.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
microsoft365suite.com has an AAAA record and answers on it.
✓ 2a02:6ea0:e237::1503:1 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mail.microsoft365suite.com ✗_dc-mx.57029d059e53.microsoft365suite.com ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
annalise.ns.cloudflare.com ✓guss.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 404.
https://microsoft365suite.com/ via 2a02:6ea0:e237::1503:1 → 404
works
 Which outside scripts, fonts, payments or chat microsoft365suite.com loads from have no IPv6.
 Load microsoft365suite.com over IPv6 from up to six other places — a second opinion.

What's keeping microsoft365suite.com from an A

  1. Mail servers without IPv6
    mail.microsoft365suite.com, _dc-mx.57029d059e53.microsoft365suite.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

microsoft365suite.com  Has IPv6

A (IPv4)37.19.207.38
AAAA (IPv6)2a02:6ea0:e237::1503:1

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/Hs1VSrXhlS · How we measure

Checked 2026-11-11 23:00:06 UTC. Full DNS report: dns.pizza/domain/microsoft365suite.com · Age, certificate and blocklists: how.is/microsoft365suite.com · JSON: /api/v1/microsoft365suite.com