~/dnsniffer/tlds/cz·rank #44
▸ How many .cz domains are registered?
901,859
active .cz domains as of .
# rank #44 of all TLDs# all records held: 944,053# snapshots: 60
~/tlds/cz/history·active domains
901,859
active .cz domains on 2026-10-15 · ▲ +887,156 (+6,033.84%) since 2025-06-30
# y-axis starts at 0, not zero - domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.
# change over time
30 days
▲ +4.37%
+37,741 domains
90 days
▲ +5.34%
+45,752 domains
1 year
▲ +30.07%
+208,502 domains
# faq
- ? How many .cz domains are registered?
- There are 901,859 active .cz domains as of October 15, 2026, according to DNSniffer’s daily count of zone-file and certificate-transparency records.
- ? Is .cz growing or shrinking?
- .cz has grown by 30.07% over the last year (+208,502 domains).
- ? Where does the .cz domain count come from?
- We ingest ICANN CZDS zone files and Certificate Transparency logs continuously and snapshot the per-TLD count once a day. A .cz domain is counted as active if it appeared in a zone file in the last 2 days, or - where no zone file is published - if a certificate was issued for it in the last 12 months.