Yes — preview.weather.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
preview.weather.gov has 3 IPv6 addresses and answers on every one we tested.
✓ 2600:1408:ec00:f::1730:cb2a answers · 443✓ 2600:1408:ec00:f::1730:cb33 answers · 443✓ 2600:1408:ec00:f::1730:cb32 answers · 443
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
6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
a1-97.akam.net ✓a6-65.akam.net ✓a7-66.akam.net ✓a11-66.akam.net ✓a18-67.akam.net ✓a26-64.akam.net ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://preview.weather.gov/ via 2600:1408:ec00:f::1730:cb2a → 200
works
 Load preview.weather.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/preview.weather.gov.svg)](https://aaaa.bot/preview.weather.gov)

Check again

preview.weather.gov  Has IPv6

Alias ofsancert.weather.gov.edgekey.net → e353369.dscg.akamaiedge.net
A (IPv4)23.204.115.7
23.204.115.15
AAAA (IPv6)2600:1408:ec00:f::1730:cb2a
2600:1408:ec00:f::1730:cb33
2600:1408:ec00:f::1730:cb32

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/uVKIk3camT · How we measure

Checked 2026-11-02 18:16:14 UTC. Full DNS report: dns.pizza/domain/preview.weather.gov · Age, certificate and blocklists: how.is/preview.weather.gov · JSON: /api/v1/preview.weather.gov