IPv6
Measured 2026-11-15 15:50 UTC · aaaa.botWebsite, mail and DNS all work over IPv6.
The published IPv6 address accepted a connection when we tried it.
- ✓ firmy.cz answers (1 of 1 addresses)
- ✓ www.firmy.cz answers (1 of 1)
- ✓ Mail: 2 of 2 servers have IPv6
- ✓ Nameservers: 2 of 2 have IPv6
Details: published addresses and what answered
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
| Name | Published address (AAAA) | Answers when we connect |
|---|---|---|
| firmy.cz | Published2a02:598:2::191 | Answers when we connect✓ answers on 443 |
| www.firmy.cz | Published2a02:598:2::191 | Answers when we connect✓ answers on 443 |
Publishedbb4bdcba74d9f0f3.mx1.emailprofi.seznam.czbb4bdcba74d9f0f3.mx2.emailprofi.seznam.cz | Answers when we connect✓ has IPv6✓ has IPv6 | |
| Nameservers | Publishedams.seznam.czans.seznam.cz | Answers when we connect✓ has IPv6✓ has IPv6 |
See where it lives on the IPv4 map →
Lineage
Our records: Mar 8, 2009 → Nov 15, 2026Oldest registry snapshot we hold: 2025 · 1 renewal on record. These dates are when our records begin, not when the domain was registered.
DNS provider
- seznam.czMar 2009 – Jun 2026
IPv6
- IPv6published, and answeringFirst measured Nov 2026
What changed
- IPv6 first measured: published, and answering on Nov 4, 2026firmy.cz has 1 IPv6 address. Grade A. Measured by aaaa.bot, 2026-11-04 20:40 UTC. No earlier IPv6 record is held, so this is not a "gained" date.
- Renewed +1 year between Jul 11, 2025 and Sep 22, 2025Expiry moved from 2025-10-19 to 2026-10-19.
- New nameservers at seznam.cz between Sep 11, 2014 and May 11, 2015ms.seznam.cz, ns.seznam.cz → ams.seznam.cz, ans.seznam.cz. Old set last seen in WHOIS on 2014-09-11; new set first seen in WHOIS on 2015-05-11.
Solid bar: the stretch we observed that name. Dot: a single sighting. Dotted line: no record between sightings of the same name. Nothing is drawn between different names.
Registrar and renewals: 8 WHOIS/RDAP snapshots, 2025-07-11 to 2026-04-26 (ledger built 2026-09-27). Every renewal
DNS provider, WHOIS snapshots: 78 WHOIS/RDAP snapshots that listed nameservers, 2009-03-08 to 2026-06-07 (who.is archive). Both sources feed one row per provider (hover a bar to see which); a change is placed between the nearest observations on either side, and where the two sources disagree, both are listed under What changed.
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Explore related
Registered in 1997 — the same year as google.com, facebook.com and mail.ru.