Yes — nps.gov has IPv6.

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

This is a saved measurement from 2026-10-31 14:12 UTC. Check nps.gov live now

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

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

Nothing keeping you from an A

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 of	d1tidwb7hrqonk.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

IPv6 measurement: nps.gov
Measured 2026-10-31 14:12:15 UTC by aaaa.bot (one server on Fly.io, region iad)

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

Readiness grade A: 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 (TCP 443)
- 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 (TCP 443)
    2600:9000:28a3:1800:1:983:9400:93a1: answers (TCP 443)
    2600:9000:28a3:9200:1:983:9400:93a1: answers (TCP 443)
    2600:9000:28a3:3400:1:983:9400:93a1: answers (TCP 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
- Mail servers (MX) have IPv6: Every mail server has an AAAA record.
- Nameservers have IPv6: 2 of 2 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): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://nps.gov/ via 2600:9000:20aa:0:1:983:9400:93a1 -> HTTP 302, certificate: valid
    https://nps.gov/index.htm via 2600:9000:20aa:0:1:983:9400:93a1 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/wXyaSmzn6D

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