Yes — g.co has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
g.co has 4 IPv6 addresses and answers on every one we tested.
✓ 2607:f8b0:4004:c17::65 answers · 443✓ 2607:f8b0:4004:c17::71 answers · 443✓ 2607:f8b0:4004:c17::8a answers · 443✓ 2607:f8b0:4004:c17::66 answers · 443
yes
www over IPv6
www.g.co has 4 IPv6 addresses and answers on every one we tested.
✓ 2607:f8b0:4004:c23::65 answers · 443✓ 2607:f8b0:4004:c23::66 answers · 443✓ 2607:f8b0:4004:c23::64 answers · 443✓ 2607:f8b0:4004:c23::8a 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 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns4.google.com ✓ns2.google.com ✓ns3.google.com ✓ns1.google.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://g.co/ via 2607:f8b0:4004:c17::65 → 200
works
 Load g.co 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/g.co.svg)](https://aaaa.bot/g.co)

Check again

g.co  Has IPv6

A (IPv4)172.253.63.102
172.253.63.138
172.253.63.100
172.253.63.101
172.253.63.139
172.253.63.113
AAAA (IPv6)2607:f8b0:4004:c17::65
2607:f8b0:4004:c17::71
2607:f8b0:4004:c17::8a
2607:f8b0:4004:c17::66

www.g.co  Has IPv6

Alias ofwww3.l.google.com
A (IPv4)142.250.31.100
142.250.31.113
142.250.31.102
142.250.31.138
142.250.31.101
142.250.31.139
AAAA (IPv6)2607:f8b0:4004:c23::65
2607:f8b0:4004:c23::66
2607:f8b0:4004:c23::64
2607:f8b0:4004:c23::8a

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/OYajFt_Z0r · How we measure

Checked 2026-10-31 08:49:36 UTC. Full DNS report: dns.pizza/domain/g.co · JSON: /api/v1/g.co