Yes — naucsa.app 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
naucsa.app has an AAAA record and answers on it.
✓ 2a10:9c80::193:163:77:236 answers · 443
yes
www over IPv6
www.naucsa.app has an AAAA record and answers on it.
✓ 2a10:9c80::193:163:77:236 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx1.hostcreators.sk ✗mx2.hostcreators.sk ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1.hostcreators.sk ✓ns2.hostcreators.sk ✓ns3.hostcreators.sk ✓ns4.hostcreators.eu ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://naucsa.app/ via 2a10:9c80::193:163:77:236 → 200
works
 Load naucsa.app over IPv6 from up to six other places — a second opinion.

What's keeping naucsa.app from an A

  1. Mail servers without IPv6
    mx1.hostcreators.sk, mx2.hostcreators.sk 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

naucsa.app  Has IPv6

A (IPv4)193.163.77.236
AAAA (IPv6)2a10:9c80::193:163:77:236

www.naucsa.app  Has IPv6

A (IPv4)193.163.77.236
AAAA (IPv6)2a10:9c80::193:163:77:236

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/b6NH-fqVCS · How we measure

Checked 2026-10-31 00:25:36 UTC. Full DNS report: dns.pizza/domain/naucsa.app · JSON: /api/v1/naucsa.app