Yes — g.co has IPv6.

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

This is a saved measurement from 2026-10-31 03:04 UTC. Check g.co live now

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:c23::65 answers · 443✓ 2607:f8b0:4004:c23::71 answers · 443✓ 2607:f8b0:4004:c23::8a answers · 443✓ 2607:f8b0:4004:c23::8b answers · 443	yes
www over IPv6 www.g.co has 4 IPv6 addresses and answers on every one we tested. ✓ 2607:f8b0:4004:c08::64 answers · 443✓ 2607:f8b0:4004:c08::65 answers · 443✓ 2607:f8b0:4004:c08::8a answers · 443✓ 2607:f8b0:4004:c08::66 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. ns1.google.com ✓ns3.google.com ✓ns2.google.com ✓ns4.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:c23::65 → 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/g.co.svg)](https://aaaa.bot/g.co)

Check again

g.co Has IPv6

A (IPv4)	142.251.163.138 142.251.163.113 142.251.163.100 142.251.163.102 142.251.163.101 142.251.163.139
AAAA (IPv6)	2607:f8b0:4004:c23::65 2607:f8b0:4004:c23::71 2607:f8b0:4004:c23::8a 2607:f8b0:4004:c23::8b

www.g.co Has IPv6

Alias of	www3.l.google.com
A (IPv4)	172.253.122.101 172.253.122.113 172.253.122.139 172.253.122.102 172.253.122.138 172.253.122.100
AAAA (IPv6)	2607:f8b0:4004:c08::64 2607:f8b0:4004:c08::65 2607:f8b0:4004:c08::8a 2607:f8b0:4004:c08::66

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: g.co
Measured 2026-10-31 03:04:34 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    142.251.163.138, 142.251.163.113, 142.251.163.100, 142.251.163.102, 142.251.163.101, 142.251.163.139
AAAA (IPv6): 2607:f8b0:4004:c23::65, 2607:f8b0:4004:c23::71, 2607:f8b0:4004:c23::8a, 2607:f8b0:4004:c23::8b
www AAAA:    2607:f8b0:4004:c08::64, 2607:f8b0:4004:c08::65, 2607:f8b0:4004:c08::8a, 2607:f8b0:4004:c08::66

Readiness grade A: 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:c23::65: answers (TCP 443)
    2607:f8b0:4004:c23::71: answers (TCP 443)
    2607:f8b0:4004:c23::8a: answers (TCP 443)
    2607:f8b0:4004:c23::8b: answers (TCP 443)
- www over IPv6: www.g.co has 4 IPv6 addresses and answers on every one we tested.
    2607:f8b0:4004:c08::64: answers (TCP 443)
    2607:f8b0:4004:c08::65: answers (TCP 443)
    2607:f8b0:4004:c08::8a: answers (TCP 443)
    2607:f8b0:4004:c08::66: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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: HTTP 200.
    https://g.co/ via 2607:f8b0:4004:c23::65 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/yrMfU6Nj1H

Permanent link: aaaa.bot/r/yrMfU6Nj1H · How we measure

Checked 2026-10-31 03:04:34 UTC. Full DNS report: dns.pizza/domain/g.co · JSON: /api/v1/g.co