Yes — kleo.bot has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
kleo.bot has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3031::ac43:a66a answers · 443✓ 2606:4700:3037::6815:ba1 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx1.efwd.spaceship.net ✗mx2.efwd.spaceship.net ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
dax.ns.cloudflare.com ✓melany.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://kleo.bot/ via 2606:4700:3031::ac43:a66a → 303https://kleo.bot/login?next=%2F via 2606:4700:3031::ac43:a66a → 200
works
 Load kleo.bot over IPv6 from up to six other places — a second opinion.

What's keeping kleo.bot from an A

  1. Mail servers without IPv6
    mx1.efwd.spaceship.net, mx2.efwd.spaceship.net have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

kleo.bot  Has IPv6

A (IPv4)104.21.11.161
172.67.166.106
AAAA (IPv6)2606:4700:3031::ac43:a66a
2606:4700:3037::6815:ba1

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/vzxh5KO8uq · How we measure

Checked 2026-11-03 08:31:01 UTC. Full DNS report: dns.pizza/domain/kleo.bot · Age, certificate and blocklists: how.is/kleo.bot · JSON: /api/v1/kleo.bot