Yes — docs.house.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
docs.house.gov has 2 IPv6 addresses and answers on every one we tested.
✓ 2600:1408:c400:f95::12a8 answers · 443✓ 2600:1408:c400:f80::12a8 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
4 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
oxygen.house.gov ✗oxygen2.house.gov ✗pdns109.ultradns.biz ✓pdns109.ultradns.com ✓pdns109.ultradns.net ✓pdns109.ultradns.org ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://docs.house.gov/ via 2600:1408:c400:f95::12a8 → 200
works
 Load docs.house.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/docs.house.gov.svg)](https://aaaa.bot/docs.house.gov)

Check again

docs.house.gov  Has IPv6

Alias ofclkd1.house.gov → wc.house.gov.edgekey.net → e4776.dscb.akamaiedge.net
A (IPv4)104.81.166.177
AAAA (IPv6)2600:1408:c400:f95::12a8
2600:1408:c400:f80::12a8

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/WnAXNsmk_C · How we measure

Checked 2026-11-01 21:55:56 UTC. Full DNS report: dns.pizza/domain/docs.house.gov · JSON: /api/v1/docs.house.gov