Yes — autodiscover.census.gov has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
autodiscover.census.gov has 4 IPv6 addresses and answers on every one we tested.
✓ 2603:1036:303:3c18::8 answers · 80✓ 2603:1036:302:415c::8 answers · 80✓ 2603:1036:302:4156::8 answers · 80✓ 2603:1036:302:5059::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
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1e.census.gov ✓ns2e.census.gov ✓
yes
HTTPS over IPv6 · not part of the grade yet
autodiscover.census.gov didn't complete an HTTPS request over IPv6 (ECONNREFUSED).
https://autodiscover.census.gov/ via 2603:1036:303:3c18::8 · ECONNREFUSED
?
 Load autodiscover.census.gov 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/autodiscover.census.gov.svg)](https://aaaa.bot/autodiscover.census.gov)

Check again

autodiscover.census.gov  Has IPv6

Alias ofautodiscover.outlook.com → autodiscover.outlook.cloud.microsoft → acdcatm.autodiscover.mira.tm.svc.cloud.microsoft → autod.ms-acdc-autod.office.com
A (IPv4)52.96.165.232
52.96.165.248
52.96.173.152
52.96.88.104
AAAA (IPv6)2603:1036:303:3c18::8
2603:1036:302:415c::8
2603:1036:302:4156::8
2603:1036:302:5059::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

 Permanent link: aaaa.bot/r/0-CyWPk9bi · How we measure

Checked 2026-11-02 02:26:34 UTC. Full DNS report: dns.pizza/domain/autodiscover.census.gov · JSON: /api/v1/autodiscover.census.gov