Yes — chance.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
chance.cz has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:440d::ac40:9389 answers · 443✓ 2606:4700:440d::6812:2877 answers · 443
yes
www over IPv6
www.chance.cz has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:440d::6812:2877 answers · 443✓ 2606:4700:440d::ac40:9389 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
chance-cz.mail.protection.outlook.com ✓
yes
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
charles.ns.cloudflare.com ✓roxy.ns.cloudflare.com ✓
yes

First measured 2026-11-04; last confirmed 2026-11-04.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 403.
https://chance.cz/ via 2606:4700:440d::ac40:9389 → 302https://www.chance.cz/ via 2606:4700:440d::6812:2877 → 403
works
 Which outside scripts, fonts, payments or chat chance.cz loads from have no IPv6.
 Load chance.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/chance.cz.svg)](https://aaaa.bot/chance.cz)

Check again

chance.cz  Has IPv6

A (IPv4)172.64.147.137
104.18.40.119
AAAA (IPv6)2606:4700:440d::ac40:9389
2606:4700:440d::6812:2877

www.chance.cz  Has IPv6

A (IPv4)172.64.147.137
104.18.40.119
AAAA (IPv6)2606:4700:440d::6812:2877
2606:4700:440d::ac40:9389

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/dWlcDi3lc- · How we measure

Checked 2026-11-15 15:46:03 UTC. Full DNS report: dns.pizza/domain/chance.cz · Age, certificate and blocklists: how.is/chance.cz · JSON: /api/v1/chance.cz