Yes — claude.ai has IPv6.

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

This is a saved measurement from 2026-10-30 21:04 UTC. Check claude.ai live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 claude.ai has an AAAA record and answers on it. ✓ 2607:6bc0::10 answers · 443	yes
www over IPv6 www.claude.ai has an AAAA record and answers on it. ✓ 2607:6bc0::10 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. isla.ns.cloudflare.com ✓randy.ns.cloudflare.com ✓	yes

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

https://claude.ai/ via 2607:6bc0::10 → 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/claude.ai.svg)](https://aaaa.bot/claude.ai)

Check again

claude.ai Has IPv6

A (IPv4)	160.79.104.10
AAAA (IPv6)	2607:6bc0::10

www.claude.ai Has IPv6

A (IPv4)	160.79.104.10
AAAA (IPv6)	2607:6bc0::10

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: claude.ai
Measured 2026-10-30 21:04:35 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    160.79.104.10
AAAA (IPv6): 2607:6bc0::10
www AAAA:    2607:6bc0::10

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: claude.ai has an AAAA record and answers on it.
    2607:6bc0::10: answers (TCP 443)
- www over IPv6: www.claude.ai has an AAAA record and answers on it.
    2607:6bc0::10: 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: HTTP 403.
    https://claude.ai/ via 2607:6bc0::10 -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/BkW9BXADdi

Permanent link: aaaa.bot/r/BkW9BXADdi · How we measure

Checked 2026-10-30 21:04:35 UTC. Full DNS report: dns.pizza/domain/claude.ai · JSON: /api/v1/claude.ai