.cz domain list
There are 978,906 registrable .cz domain names in our data, with 1,747,258 subdomains under them, in the release updated 16 October 2026 — names only, as historical observations, not proof that a name resolves or is in use today.
The subdomain file has 1.8 .cz names for each registrable .cz domain in the domain file, against 4.0 across all top-level domains. This is a ratio of file rows, not a typical count for one site: many domains have no subdomains in the file. The most common tracked leftmost label is www (850,097 names, 48.7% of .cz subdomains).
.cz domain names
How the 978,906 registrable .cz names are built (the label before the suffix):
| Label type | Domains | Share |
|---|---|---|
| Letters only | 771,201 | 78.8% |
| Letters and digits | 26,605 | 2.7% |
| Digits only | 9,671 | 1.0% |
| Hyphenated | 171,427 | 17.5% |
| Internationalized (xn--) | 2 | <0.1% |
Public suffixes under .cz:
| Suffix | Domains | Share |
|---|---|---|
cz | 978,466 | 100.0% |
gov.cz | 440 | <0.1% |
.cz subdomains
Depth counts the labels to the left of the registrable domain.
| Depth | Subdomains | Share |
|---|---|---|
| 1 (a.example.cz) | 1,288,145 | 73.7% |
| 2 | 221,216 | 12.7% |
| 3 | 108,354 | 6.2% |
| 4 or more | 129,543 | 7.4% |
Tracked leftmost labels (name patterns, not confirmed services):
| Label | Subdomains | Share |
|---|---|---|
www | 850,097 | 48.7% |
mail | 20,356 | 1.2% |
admin | 12,586 | 0.7% |
webmail | 11,134 | 0.6% |
test | 10,354 | 0.6% |
autodiscover | 10,171 | 0.6% |
api | 9,252 | 0.5% |
dev | 8,841 | 0.5% |
Getting only .cz
The release is sold as two complete files covering every TLD in it, not as per-TLD lists. To keep only .cz, filter the files you download, for example:
zgrep -E '\.cz$' getdomainlists-2026-10-16-domains.txt.gz > cz-domains.txt zgrep -E '\.cz$' getdomainlists-2026-10-16-subdomains.txt.gz > cz-subdomains.txt
Try the format first with the free 1,000-name samples. Both full files are $9 once, with 30 days to download.
Limits
- Historical observations collected up to this release (updated 16 October 2026); not proof that a name is registered, resolves or is in use today.
- Coverage is incomplete and uneven; these counts describe this release, not the whole .cz namespace.
- Names only: no owner, contact, hosting or registration-date data.