Yes — medlineplus.gov has IPv6.

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

Measured 2026-11-08 16:57 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check medlineplus.gov now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
medlineplus.gov has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2600:9000:286a:a600:1:6b7c:7400:93a1 answers · 443✓ 2600:9000:286a:6a00:1:6b7c:7400:93a1 answers · 443✓ 2600:9000:286a:1000:1:6b7c:7400:93a1 answers · 443✓ 2600:9000:286a:e600:1:6b7c:7400:93a1 answers · 443– 2600:9000:286a:e000:1:6b7c:7400:93a1 not tested– 2600:9000:286a:1e00:1:6b7c:7400:93a1 not tested– 2600:9000:286a:5000:1:6b7c:7400:93a1 not tested– 2600:9000:286a:c800:1:6b7c:7400:93a1 not tested
yes
www over IPv6
www.medlineplus.gov has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2600:9000:286a:c00:1:6b7c:7400:93a1 answers · 443✓ 2600:9000:286a:4400:1:6b7c:7400:93a1 answers · 443✓ 2600:9000:286a:ee00:1:6b7c:7400:93a1 answers · 443✓ 2600:9000:286a:fc00:1:6b7c:7400:93a1 answers · 443– 2600:9000:286a:3400:1:6b7c:7400:93a1 not tested– 2600:9000:286a:c400:1:6b7c:7400:93a1 not tested– 2600:9000:286a:a600:1:6b7c:7400:93a1 not tested– 2600:9000:286a:2000:1:6b7c:7400:93a1 not tested
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
nihcesxway3.hub.nih.gov ✓nihcesxway4.hub.nih.gov ✓nihcesxway5.hub.nih.gov ✓
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

First measured 2026-11-08; last confirmed 2026-11-08.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://medlineplus.gov/ via 2600:9000:286a:a600:1:6b7c:7400:93a1 → 200
works
 Which outside scripts, fonts, payments or chat medlineplus.gov loads from have no IPv6.
 Load medlineplus.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/medlineplus.gov.svg)](https://aaaa.bot/medlineplus.gov)

Check again

medlineplus.gov  Has IPv6

Alias ofmedlineplus.awsprod.nlm.nih.gov
A (IPv4)3.170.3.7
3.170.3.117
3.170.3.51
3.170.3.114
AAAA (IPv6)2600:9000:286a:a600:1:6b7c:7400:93a1
2600:9000:286a:6a00:1:6b7c:7400:93a1
2600:9000:286a:1000:1:6b7c:7400:93a1
2600:9000:286a:e600:1:6b7c:7400:93a1
2600:9000:286a:e000:1:6b7c:7400:93a1
2600:9000:286a:1e00:1:6b7c:7400:93a1
2600:9000:286a:5000:1:6b7c:7400:93a1
2600:9000:286a:c800:1:6b7c:7400:93a1

www.medlineplus.gov  Has IPv6

Alias ofmedlineplus.awsprod.nlm.nih.gov
A (IPv4)3.170.3.51
3.170.3.114
3.170.3.117
3.170.3.7
AAAA (IPv6)2600:9000:286a:c00:1:6b7c:7400:93a1
2600:9000:286a:4400:1:6b7c:7400:93a1
2600:9000:286a:ee00:1:6b7c:7400:93a1
2600:9000:286a:fc00:1:6b7c:7400:93a1
2600:9000:286a:3400:1:6b7c:7400:93a1
2600:9000:286a:c400:1:6b7c:7400:93a1
2600:9000:286a:a600:1:6b7c:7400:93a1
2600:9000:286a:2000:1:6b7c:7400:93a1

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/nzc-XyWEhA · How we measure

Checked 2026-11-08 16:57:09 UTC. Full DNS report: dns.pizza/domain/medlineplus.gov · Age, certificate and blocklists: how.is/medlineplus.gov · JSON: /api/v1/medlineplus.gov