Yes — nps.gov has IPv6.

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

Measured 2026-10-31 14:12 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check nps.gov now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
nps.gov has an AAAA record and answers on it.
✓ 2600:9000:20aa:0:1:983:9400:93a1 answers · 443
yes
www over IPv6
www.nps.gov has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2600:9000:28a3:6400:1:983:9400:93a1 answers · 443✓ 2600:9000:28a3:1800:1:983:9400:93a1 answers · 443✓ 2600:9000:28a3:9200:1:983:9400:93a1 answers · 443✓ 2600:9000:28a3:3400:1:983:9400:93a1 answers · 443– 2600:9000:28a3:b200:1:983:9400:93a1 not tested– 2600:9000:28a3:9800:1:983:9400:93a1 not tested– 2600:9000:28a3:1e00:1:983:9400:93a1 not tested– 2600:9000:28a3:f000:1:983:9400:93a1 not tested
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
nps-gov.mail.protection.outlook.com ✓
yes
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ivan.ns.cloudflare.com ✓lucy.ns.cloudflare.com ✓
yes

First measured 2026-10-31; last confirmed 2026-10-31.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://nps.gov/ via 2600:9000:20aa:0:1:983:9400:93a1 → 302https://nps.gov/index.htm via 2600:9000:20aa:0:1:983:9400:93a1 → 200
works
 Load nps.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/nps.gov.svg)](https://aaaa.bot/nps.gov)

Check again

nps.gov  Has IPv6

A (IPv4)35.169.243.105
AAAA (IPv6)2600:9000:20aa:0:1:983:9400:93a1

www.nps.gov  Has IPv6

Alias ofd1tidwb7hrqonk.cloudfront.net
A (IPv4)3.171.61.24
3.171.61.34
3.171.61.95
3.171.61.128
AAAA (IPv6)2600:9000:28a3:6400:1:983:9400:93a1
2600:9000:28a3:1800:1:983:9400:93a1
2600:9000:28a3:9200:1:983:9400:93a1
2600:9000:28a3:3400:1:983:9400:93a1
2600:9000:28a3:b200:1:983:9400:93a1
2600:9000:28a3:9800:1:983:9400:93a1
2600:9000:28a3:1e00:1:983:9400:93a1
2600:9000:28a3:f000:1:983:9400:93a1

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/wXyaSmzn6D · How we measure

Checked 2026-10-31 14:12:15 UTC. Full DNS report: dns.pizza/domain/nps.gov · JSON: /api/v1/nps.gov