Yes — cloud.microsoft has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
cloud.microsoft has 4 IPv6 addresses and answers on every one we tested (1 more not tested).
✓ 2603:1030:20e:3::23c answers · 443✓ 2603:1030:c02:8::14 answers · 443✓ 2603:1010:3:3::5b answers · 443✓ 2603:1020:201:10::10f answers · 443– 2603:1030:b:3::152 not tested
yes
www over IPv6
www.cloud.microsoft has 4 IPv6 addresses and answers on every one we tested (1 more not tested).
✓ 2603:1010:3:3::5b answers · 443✓ 2603:1020:201:10::10f answers · 443✓ 2603:1030:b:3::152 answers · 443✓ 2603:1030:20e:3::23c answers · 443– 2603:1030:c02:8::14 not tested
yes
Mail servers (MX) have IPv6
No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.		yes
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1-33.azure-dns.com ✓ns2-33.azure-dns.net ✓ns3-33.azure-dns.org ✓ns4-33.azure-dns.info ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://cloud.microsoft/ via 2603:1030:20e:3::23c → 301https://m365.cloud.microsoft/ via 2603:1061:10::13 → 200
works
 Load cloud.microsoft over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

  1. Nothing to fix
    Show it off: add the badge to your README.
    [![IPv6](https://aaaa.bot/badge/cloud.microsoft.svg)](https://aaaa.bot/cloud.microsoft)

Check again

cloud.microsoft  Has IPv6

A (IPv4)20.236.44.162
20.70.246.20
20.76.201.171
20.112.250.133
20.231.239.246
AAAA (IPv6)2603:1030:20e:3::23c
2603:1030:c02:8::14
2603:1010:3:3::5b
2603:1020:201:10::10f
2603:1030:b:3::152

www.cloud.microsoft  Has IPv6

Alias ofcloud.microsoft
A (IPv4)20.112.250.133
20.231.239.246
20.236.44.162
20.70.246.20
20.76.201.171
AAAA (IPv6)2603:1010:3:3::5b
2603:1020:201:10::10f
2603:1030:b:3::152
2603:1030:20e:3::23c
2603:1030:c02:8::14

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/b9jMa5vF1p · How we measure

Checked 2026-10-30 20:32:24 UTC. Full DNS report: dns.pizza/domain/cloud.microsoft · JSON: /api/v1/cloud.microsoft