Search in the .CZ domain registry (WHOIS)
Whois searches in domain names, contacts and name server sets. The domain name must be entered in the format domainname.cz with the .cz extension at the end and without the leading www. (i.e. dmakler.cz). Contact handles or name server sets are entered as plain text. To search for a domain in another zone use the search engine: WHOIS.COM Lookup, IANA WHOIS Service. You will find the Terms of Service in Intended use of supplied data and information.
Enter the .CZ domain name and click the "Search" button.