Yes — autodiscover.colorado.edu has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 autodiscover.colorado.edu has 4 IPv6 addresses and answers on every one we tested. ✓ 2603:1036:302:4846::8 answers · 80✓ 2603:1036:302:4833::8 answers · 80✓ 2603:1036:304:3406::8 answers · 80✓ 2603:1036:303:3804::8 answers · 80	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 6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. a1-153.akam.net ✓a2-67.akam.net ✓a20-65.akam.net ✓a11-66.akam.net ✓a3-66.akam.net ✓a22-67.akam.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
autodiscover.colorado.edu didn't complete an HTTPS request over IPv6 (ECONNREFUSED).

https://autodiscover.colorado.edu/ via 2603:1036:302:4846::8 · ECONNREFUSED

Nothing keeping you from an A

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

Check again

autodiscover.colorado.edu Has IPv6

Alias of	autodiscover.outlook.com → autodiscover.outlook.cloud.microsoft → acdcatm.autodiscover.mira.tm.svc.cloud.microsoft → autod.ms-acdc-autod.office.com
A (IPv4)	52.96.111.88 52.96.163.56 52.96.183.40 52.96.88.24
AAAA (IPv6)	2603:1036:302:4846::8 2603:1036:302:4833::8 2603:1036:304:3406::8 2603:1036:303:3804::8

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: autodiscover.colorado.edu
Measured 2026-11-03 16:13:43 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    52.96.111.88, 52.96.163.56, 52.96.183.40, 52.96.88.24
AAAA (IPv6): 2603:1036:302:4846::8, 2603:1036:302:4833::8, 2603:1036:304:3406::8, 2603:1036:303:3804::8

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: autodiscover.colorado.edu has 4 IPv6 addresses and answers on every one we tested.
    2603:1036:302:4846::8: answers (TCP 80)
    2603:1036:302:4833::8: answers (TCP 80)
    2603:1036:304:3406::8: answers (TCP 80)
    2603:1036:303:3804::8: answers (TCP 80)
- 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: 6 of 6 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): autodiscover.colorado.edu didn't complete an HTTPS request over IPv6 (ECONNREFUSED).
    https://autodiscover.colorado.edu/ via 2603:1036:302:4846::8 (ECONNREFUSED)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/KqEGvbTHjl

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

Checked 2026-11-03 16:13:43 UTC. Full DNS report: dns.pizza/domain/autodiscover.colorado.edu · Age, certificate and blocklists: how.is/autodiscover.colorado.edu · JSON: /api/v1/autodiscover.colorado.edu