Yes — autoconfig.nethost.cz has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
autoconfig.nethost.cz has an AAAA record and answers on it.
✓ 2a00:1ed0:46:200::1213:56 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
server85.viwefix.cz ✓
yes
Nameservers have IPv6
3 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
dns.nethost.cz ✓pns.nethost.cz ✗sns.nethost.sk ✓tns.nethost.eu ✓
yes

First measured 2026-11-07; last confirmed 2026-11-07.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://autoconfig.nethost.cz/ via 2a00:1ed0:46:200::1213:56 → 403
works
 Which outside scripts, fonts, payments or chat autoconfig.nethost.cz loads from have no IPv6.
 Load autoconfig.nethost.cz over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

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

Check again

autoconfig.nethost.cz  Has IPv6

Alias ofserver85.viwefix.cz
A (IPv4)217.16.182.49
AAAA (IPv6)2a00:1ed0:46:200::1213:56

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/LjjePJEPgg · How we measure

Checked 2026-11-15 17:05:00 UTC. Full DNS report: dns.pizza/domain/autoconfig.nethost.cz · Age, certificate and blocklists: how.is/autoconfig.nethost.cz · JSON: /api/v1/autoconfig.nethost.cz