Yes — docker.com has IPv6.

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

This is a saved measurement from 2026-10-30 23:04 UTC. Check docker.com live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 docker.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2620:12a:8000::4 answers · 443✓ 2620:12a:8001::4 answers · 443	yes
www over IPv6 www.docker.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2620:12a:8000::4 answers · 443✓ 2620:12a:8001::4 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. aspmx.l.google.com ✓alt3.aspmx.l.google.com ✓alt4.aspmx.l.google.com ✓alt1.aspmx.l.google.com ✓alt2.aspmx.l.google.com ✓	yes
Nameservers have IPv6 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns-1289.awsdns-33.org ✓ns-1981.awsdns-55.co.uk ✓ns-207.awsdns-25.com ✓ns-568.awsdns-07.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://docker.com/ via 2620:12a:8000::4 → 301https://www.docker.com/ via 2620:12a:8000::4 → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/docker.com.svg)](https://aaaa.bot/docker.com)

Check again

docker.com Has IPv6

A (IPv4)	23.185.0.4
AAAA (IPv6)	2620:12a:8000::4 2620:12a:8001::4

www.docker.com Has IPv6

Alias of	live-docker.pantheonsite.io → fe4.edge.pantheon.io
A (IPv4)	23.185.0.4
AAAA (IPv6)	2620:12a:8000::4 2620:12a:8001::4

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

IPv6 measurement: docker.com
Measured 2026-10-30 23:04:36 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    23.185.0.4
AAAA (IPv6): 2620:12a:8000::4, 2620:12a:8001::4
www AAAA:    2620:12a:8000::4, 2620:12a:8001::4

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: docker.com has 2 IPv6 addresses and answers on every one we tested.
    2620:12a:8000::4: answers (TCP 443)
    2620:12a:8001::4: answers (TCP 443)
- www over IPv6: www.docker.com has 2 IPv6 addresses and answers on every one we tested.
    2620:12a:8000::4: answers (TCP 443)
    2620:12a:8001::4: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server has an AAAA record.
- Nameservers have IPv6: 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://docker.com/ via 2620:12a:8000::4 -> HTTP 301, certificate: valid
    https://www.docker.com/ via 2620:12a:8000::4 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/a6osxXZCyL

Permanent link: aaaa.bot/r/a6osxXZCyL · How we measure

Checked 2026-10-30 23:04:36 UTC. Full DNS report: dns.pizza/domain/docker.com · JSON: /api/v1/docker.com