Yes — facebook.com has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
facebook.com has an AAAA record and answers on it.
✓ 2a03:2880:f381:1:face:b00c:0:25de answers · 443
yes
www over IPv6
www.facebook.com has an AAAA record and answers on it.
✓ 2a03:2880:f381:1:face:b00c:0:25de answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
smtpin.vvv.facebook.com ✓
yes
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
d.ns.facebook.com ✓a.ns.facebook.com ✓b.ns.facebook.com ✓c.ns.facebook.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://facebook.com/ via 2a03:2880:f381:1:face:b00c:0:25de → 301https://www.facebook.com/ via 2a03:2880:f381:1:face:b00c:0:25de → 200
works
 Load facebook.com 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/facebook.com.svg)](https://aaaa.bot/facebook.com)

Check again

facebook.com  Has IPv6

A (IPv4)57.145.2.1
AAAA (IPv6)2a03:2880:f381:1:face:b00c:0:25de

www.facebook.com  Has IPv6

Alias ofstar-mini.c10r.facebook.com
A (IPv4)57.145.2.1
AAAA (IPv6)2a03:2880:f381:1:face:b00c:0:25de

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/kR1gdt6g3R · How we measure

Checked 2026-10-30 17:14:37 UTC. Full DNS report: dns.pizza/domain/facebook.com · JSON: /api/v1/facebook.com