Yes — autodiscover.delaware.gov has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: www doesn't fully work over IPv6.
Website over IPv6
autodiscover.delaware.gov has 4 IPv6 addresses and answers on every one we tested.
✓ 2603:1036:303:3c17::8 answers · 80✓ 2603:1036:303:3094::8 answers · 80✓ 2603:1036:303:3c03::8 answers · 80✓ 2603:1036:207:457::8 answers · 80
yes
www over IPv6
www.autodiscover.delaware.gov has no AAAA record.		no
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.
gold.foundationdns.com ✓gold.foundationdns.net ✓gold.foundationdns.org ✓
yes
HTTPS over IPv6 · not part of the grade yet
autodiscover.delaware.gov didn't complete an HTTPS request over IPv6 (ECONNREFUSED).
https://autodiscover.delaware.gov/ via 2603:1036:303:3c17::8 · ECONNREFUSED
?
 Load autodiscover.delaware.gov over IPv6 from up to six other places — a second opinion.

What's keeping autodiscover.delaware.gov from an A

  1. Add IPv6 for www.autodiscover.delaware.gov
    www.autodiscover.delaware.gov has no AAAA record. Get www's IPv6 address from whoever hosts www and add it as an AAAA record. If the same server already serves both names (and its certificate covers www), you can reuse autodiscover.delaware.gov's AAAA record(s) for www. How to add an AAAA record

Check again

autodiscover.delaware.gov  Has IPv6

Alias ofautodiscover.outlook.com → autodiscover.outlook.cloud.microsoft → acdcatm.autodiscover.mira.tm.svc.cloud.microsoft → atm.autodiscover.mira.tm.svc.cloud.microsoft
A (IPv4)40.104.46.88
40.104.47.104
52.96.87.216
52.96.88.24
52.96.109.152
52.96.109.248
52.96.179.120
52.96.182.120
AAAA (IPv6)2603:1036:303:3c17::8
2603:1036:303:3094::8
2603:1036:303:3c03::8
2603:1036:207:457::8

www.autodiscover.delaware.gov  No address

A (IPv4)none
AAAA (IPv6)none

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/FV9x2UOcHP · How we measure

Checked 2026-11-03 09:36:15 UTC. Full DNS report: dns.pizza/domain/autodiscover.delaware.gov · Age, certificate and blocklists: how.is/autodiscover.delaware.gov · JSON: /api/v1/autodiscover.delaware.gov