IPv6
Measured 2026-11-04 18:37 UTC · aaaa.botThe website has no IPv6.
fio.cz has no IPv6 address published.
- ✗ fio.cz: no IPv6 address
- ✗ www.fio.cz: no IPv6 address
- ✗ Mail: 1 of 3 servers have IPv6
- ✓ Nameservers: 4 of 6 have IPv6
Details: published addresses and what answered
| Name | Published address (AAAA) | Answers when we connect |
|---|---|---|
| fio.cz | Publishedno IPv6 address published | Answers when we connectnothing to test |
| www.fio.cz | Publishedno IPv6 address published | Answers when we connectnothing to test |
Publishedmx1.fio.czsmtp1.fio.czsmtp2.fio.cz | Answers when we connect✗ no IPv6✗ no IPv6✓ has IPv6 | |
| Nameservers | Publishedns1.fio.czns2.fio.czdns41.cloudns.netdns42.cloudns.netdns43.cloudns.netdns44.cloudns.net | Answers when we connect✗ no IPv6✗ no IPv6✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6 |
Lineage
Our records: Jan 15, 2009 → Nov 4, 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
- vol.czJan – Jun 2009
- fio.czOct 2009 – Apr 2022
- cloudns.net + fio.czApr 2022 – Jun 2026
IPv6
- IPv6no IPv6 publishedFirst measured Nov 2026
What changed
- IPv6 first measured: no IPv6 published on Nov 4, 2026fio.cz: no IPv6 published. Grade D. Measured by aaaa.bot, 2026-11-04 18:37 UTC. No earlier IPv6 record is held, so this is not a "gained" date.
- Renewed +1 year between Sep 24, 2025 and Oct 24, 2025Expiry moved from 2025-10-26 to 2026-10-26.
- DNS moved to cloudns.net + fio.cz between Apr 6, 2022 and Apr 21, 2022ns1.fio.cz, ns2.fio.cz → dns41.cloudns.net, dns42.cloudns.net, dns43.cloudns.net, dns44.cloudns.net, ns1.fio.cz, ns2.fio.cz. Old set last seen in WHOIS on 2022-04-06; new set first seen in WHOIS on 2022-04-21.
- DNS moved to fio.cz between Jun 30, 2009 and Oct 14, 2009names.vol.cz, sns.vol.cz → ns1.fio.cz, ns2.fio.cz. Old set last seen in WHOIS on 2009-06-30; new set first seen in WHOIS on 2009-10-14.
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: 19 WHOIS/RDAP snapshots, 2025-01-16 to 2026-05-14 (ledger built 2026-09-27). Every renewal
DNS provider, WHOIS snapshots: 129 WHOIS/RDAP snapshots that listed nameservers, 2009-01-15 to 2026-06-25 (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 1996 — the same year as bing.com, doubleclick.net and digicert.com.