Yes — smokefree.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
smokefree.gov has an AAAA record and answers on it.
✓ 2600:9000:a601:3f6a:c82f:8bec:7e1e:f64b answers · 443
yes
www over IPv6
www.smokefree.gov has an AAAA record and answers on it.
✓ 2600:9000:a601:3f6a:c82f:8bec:7e1e:f64b 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
3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns.nih.gov ✓ns2.nih.gov ✓ns3.nih.gov ✓
yes

First measured 2026-11-04; last confirmed 2026-11-04.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://smokefree.gov/ via 2600:9000:a601:3f6a:c82f:8bec:7e1e:f64b → 200
works
 Which outside scripts, fonts, payments or chat smokefree.gov loads from have no IPv6.
 Load smokefree.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/smokefree.gov.svg)](https://aaaa.bot/smokefree.gov)

Check again

smokefree.gov  Has IPv6

A (IPv4)15.197.193.49
AAAA (IPv6)2600:9000:a601:3f6a:c82f:8bec:7e1e:f64b

www.smokefree.gov  Has IPv6

Alias ofsmokefree.gov
A (IPv4)15.197.193.49
AAAA (IPv6)2600:9000:a601:3f6a:c82f:8bec:7e1e:f64b

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/heUy60paYI · How we measure

Checked 2026-11-15 17:04:10 UTC. Full DNS report: dns.pizza/domain/smokefree.gov · Age, certificate and blocklists: how.is/smokefree.gov · JSON: /api/v1/smokefree.gov