Yes — microsot-teams.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 microsot-teams.com has an AAAA record and answers on it. ✓ 2a10:1fc0:5::6146:754a answers · 443	yes
www over IPv6 www.microsot-teams.com has an AAAA record and answers on it. ✓ 2a10:1fc0:5::6146:754a answers · 443	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 3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns3.rrpproxy.net ✓ns2.rrpproxy.net ✓ns1.rrpproxy.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
The certificate served over IPv6 at 2a10:1fc0:5::6146:754a isn't valid for microsot-teams.com: DEPTH_ZERO_SELF_SIGNED_CERT.

https://microsot-teams.com/ via 2a10:1fc0:5::6146:754a · DEPTH_ZERO_SELF_SIGNED_CERT

problem

Nothing keeping you from an A

The certificate served over IPv6 is wrong
The certificate served over IPv6 at 2a10:1fc0:5::6146:754a isn't valid for microsot-teams.com: DEPTH_ZERO_SELF_SIGNED_CERT. Often the IPv6 address points at a different server (or an old one) than IPv4 does. Make sure 2a10:1fc0:5::6146:754a serves the same certificate as your IPv4 address.

Check again

microsot-teams.com Has IPv6

A (IPv4)	45.66.248.175
AAAA (IPv6)	2a10:1fc0:5::6146:754a

www.microsot-teams.com Has IPv6

A (IPv4)	45.66.248.175
AAAA (IPv6)	2a10:1fc0:5::6146:754a

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

IPv6 measurement: microsot-teams.com
Measured 2026-11-13 03:38:41 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    45.66.248.175
AAAA (IPv6): 2a10:1fc0:5::6146:754a
www AAAA:    2a10:1fc0:5::6146:754a

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: microsot-teams.com has an AAAA record and answers on it.
    2a10:1fc0:5::6146:754a: answers (TCP 443)
- www over IPv6: www.microsot-teams.com has an AAAA record and answers on it.
    2a10:1fc0:5::6146:754a: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.
- Nameservers have IPv6: 3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): The certificate served over IPv6 at 2a10:1fc0:5::6146:754a isn't valid for microsot-teams.com: DEPTH_ZERO_SELF_SIGNED_CERT.
    https://microsot-teams.com/ via 2a10:1fc0:5::6146:754a, certificate: DEPTH_ZERO_SELF_SIGNED_CERT
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/0BjfJBbGjS

Permanent link: aaaa.bot/r/0BjfJBbGjS · How we measure

Checked 2026-11-13 03:38:41 UTC. Full DNS report: dns.pizza/domain/microsot-teams.com · Age, certificate and blocklists: how.is/microsot-teams.com · JSON: /api/v1/microsot-teams.com