Yes — ftp.avonet.cz has IPv6.

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

This is a saved measurement from 2026-11-07 03:01 UTC. Check ftp.avonet.cz live now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
ftp.avonet.cz has an AAAA record and answers on it.
✓ 2a00:6500:0:11::eb:0 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
3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns.avonet.cz ✓sns.avonet.cz ✓tns.avonet.cz ✓
yes
HTTPS over IPv6 · not part of the grade yet
The certificate served over IPv6 at 2a00:6500:0:11::eb:0 isn't valid for ftp.avonet.cz: DEPTH_ZERO_SELF_SIGNED_CERT.
https://ftp.avonet.cz/ via 2a00:6500:0:11::eb:0 · DEPTH_ZERO_SELF_SIGNED_CERT
problem

Nothing keeping you from an A

  1. The certificate served over IPv6 is wrong
    The certificate served over IPv6 at 2a00:6500:0:11::eb:0 isn't valid for ftp.avonet.cz: DEPTH_ZERO_SELF_SIGNED_CERT. Often the IPv6 address points at a different server (or an old one) than IPv4 does. Make sure 2a00:6500:0:11::eb:0 serves the same certificate as your IPv4 address.

Check again

ftp.avonet.cz  Has IPv6

Alias ofvirt.avonet.cz
A (IPv4)217.112.162.40
AAAA (IPv6)2a00:6500:0:11::eb:0

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/fOfhAv6xmi · How we measure

Checked 2026-11-07 03:01:54 UTC. Full DNS report: dns.pizza/domain/ftp.avonet.cz · Age, certificate and blocklists: how.is/ftp.avonet.cz · JSON: /api/v1/ftp.avonet.cz