test.avonet.cz publishes IPv6 but doesn't answer on it.

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

This is a saved measurement from 2026-11-15 17:25 UTC. Check test.avonet.cz live now

F
IPv6 readiness
Publishes IPv6 but doesn't answer on it — worse than having none.
Website over IPv6
test.avonet.cz has an AAAA record, but nothing answered on ports 443 or 80. IPv6 visitors wait for a timeout before falling back to IPv4.
✗ 2a00:6500:0:11::e:1 no answer✗ 2a00:6500:0:11::e:2 no answer
broken
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

What's keeping test.avonet.cz from an A

  1. Fix or remove the AAAA record for test.avonet.cz
    Something published an IPv6 address but nothing answers on it, so IPv6 visitors wait for a timeout first. Either make the server listen on IPv6 (and allow ports 443/80 through its firewall), or delete the AAAA record until it does.

Check again

test.avonet.cz  Has IPv6

Alias oftime.avonet.cz
A (IPv4)217.112.162.8
217.112.162.9
AAAA (IPv6)2a00:6500:0:11::e:1
2a00:6500:0:11::e:2

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/4N_l9jDaBp · How we measure

Checked 2026-11-15 17:25:08 UTC. Full DNS report: dns.pizza/domain/test.avonet.cz · Age, certificate and blocklists: how.is/test.avonet.cz · JSON: /api/v1/test.avonet.cz