Yes — m.medlineplus.gov has IPv6.

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

?
IPv6 readiness
The website works over IPv6; some other checks couldn't be completed right now.
Website over IPv6
m.medlineplus.gov has an AAAA record and answers on it.
✓ 2607:f220:41e:1016::4 answers · 443
yes
www over IPv6
The AAAA lookup failed.		?
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.
gslb01.nlm.nih.gov ✓gslb02.nlm.nih.gov ✓gslb03.nlm.nih.gov ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://m.medlineplus.gov/ via 2607:f220:41e:1016::4 → 301https://www.medlineplus.gov/ via 2600:9000:286a:2000:1:6b7c:7400:93a1 → 200
works
 Which outside scripts, fonts, payments or chat m.medlineplus.gov loads from have no IPv6.
 Load m.medlineplus.gov over IPv6 from up to six other places — a second opinion.

m.medlineplus.gov  Has IPv6

Alias ofredirector.wip.nlm.nih.gov
A (IPv4)130.14.16.4
AAAA (IPv6)2607:f220:41e:1016::4

www.m.medlineplus.gov  Couldn't check

A (IPv4)lookup failed — The operation was aborted due to timeout
AAAA (IPv6)lookup failed — The operation was aborted due to timeout

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/W4_zrIHkla · How we measure

Checked 2026-11-15 17:09:04 UTC. Full DNS report: dns.pizza/domain/m.medlineplus.gov · Age, certificate and blocklists: how.is/m.medlineplus.gov · JSON: /api/v1/m.medlineplus.gov