Yes — sd.gov has IPv6.

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

Measured 2026-11-02 16:56 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check sd.gov now

C
IPv6 readiness
Works over IPv6, with gaps: www doesn't fully work over IPv6; its mail servers lack IPv6.
Website over IPv6
sd.gov has an AAAA record and answers on it.
✓ 2603:1061:14:48::1 answers · 443
yes
www over IPv6
www.sd.gov has no AAAA record.		no
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
smtp.sd.gov ✗smtpb.sd.gov ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
abdullah.ns.cloudflare.com ✓anna.ns.cloudflare.com ✓
yes

First measured 2026-11-02; last confirmed 2026-11-02.

HTTPS over IPv6 · not part of the grade yet
Redirects to www.sd.gov, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.
https://sd.gov/ via 2603:1061:14:48::1 → 308https://www.sd.gov/ · redirects to www.sd.gov, which has no IPv6 address
problem
 Load sd.gov over IPv6 from up to six other places — a second opinion.

What's keeping sd.gov from an A

  1. www.sd.gov is an alias of sdcsm.servicenowservices.com, which has no IPv6
    www.sd.gov is a CNAME, so it can't also have its own AAAA record. Ask whoever runs sdcsm.servicenowservices.com to enable IPv6 there — or replace the alias with the A and AAAA records they give you. Why some hosts don't offer IPv6
  2. A redirect leads off IPv6
    Redirects to www.sd.gov, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all. Give the redirect target IPv6 too, or redirect somewhere that has it.
  3. Mail servers without IPv6
    smtp.sd.gov, smtpb.sd.gov have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

sd.gov  Has IPv6

A (IPv4)150.171.109.72
AAAA (IPv6)2603:1061:14:48::1

www.sd.gov  IPv4 only

Alias ofsdcsm.servicenowservices.com
A (IPv4)149.96.185.146
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/W_PRq_7hSq · How we measure

Checked 2026-11-02 16:56:33 UTC. Full DNS report: dns.pizza/domain/sd.gov · Age, certificate and blocklists: how.is/sd.gov · JSON: /api/v1/sd.gov