Yes — zett.tel 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
zett.tel has an AAAA record and answers on it.
✓ 2a01:4f8:c016:445c::1 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mailserver.purelymail.com ✗
no
Nameservers have IPv6
3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
helium.ns.hetzner.de ✓hydrogen.ns.hetzner.com ✓oxygen.ns.hetzner.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://zett.tel/ via 2a01:4f8:c016:445c::1 → 200
works
 Which outside scripts, fonts, payments or chat zett.tel loads from have no IPv6.
 Load zett.tel over IPv6 from up to six other places — a second opinion.

What's keeping zett.tel from an A

  1. Mail servers without IPv6
    mailserver.purelymail.com has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

zett.tel  Has IPv6

A (IPv4)2.31.132.220
AAAA (IPv6)2a01:4f8:c016:445c::1

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/4xoiyz2LiI · How we measure

Checked 2026-11-07 23:46:37 UTC. Full DNS report: dns.pizza/domain/zett.tel · Age, certificate and blocklists: how.is/zett.tel · JSON: /api/v1/zett.tel