Yes — chatgpt.site has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 chatgpt.site has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:17ba answers · 443✓ 2606:4700::6812:16ba answers · 443	yes
www over IPv6 www.chatgpt.site has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:16ba answers · 443✓ 2606:4700::6812:17ba 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 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. bowen.ns.cloudflare.com ✓meera.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 403.

https://chatgpt.site/ via 2606:4700::6812:17ba → 301https://chatgpt.com/features/sites/ via 2606:4700:4408::ac40:9bd1 → 403

works

Nothing keeping you from an A

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

Check again

chatgpt.site Has IPv6

A (IPv4)	104.18.23.186 104.18.22.186
AAAA (IPv6)	2606:4700::6812:17ba 2606:4700::6812:16ba

www.chatgpt.site Has IPv6

A (IPv4)	104.18.23.186 104.18.22.186
AAAA (IPv6)	2606:4700::6812:16ba 2606:4700::6812:17ba

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: chatgpt.site
Measured 2026-10-31 13:25:59 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.23.186, 104.18.22.186
AAAA (IPv6): 2606:4700::6812:17ba, 2606:4700::6812:16ba
www AAAA:    2606:4700::6812:16ba, 2606:4700::6812:17ba

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: chatgpt.site has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:17ba: answers (TCP 443)
    2606:4700::6812:16ba: answers (TCP 443)
- www over IPv6: www.chatgpt.site has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:16ba: answers (TCP 443)
    2606:4700::6812:17ba: 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: 2 of 2 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 403.
    https://chatgpt.site/ via 2606:4700::6812:17ba -> HTTP 301, certificate: valid
    https://chatgpt.com/features/sites/ via 2606:4700:4408::ac40:9bd1 -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/DdO-YXq2Yi

Permanent link: aaaa.bot/r/DdO-YXq2Yi · How we measure

Checked 2026-10-31 13:25:59 UTC. Full DNS report: dns.pizza/domain/chatgpt.site · JSON: /api/v1/chatgpt.site