IP address ranges in Czechia
Czechia holds 11,841 IPv4 segments in the IP99 geolocation database, covering 8,622,530 addresses. In the 4 days to 12 September 2026 we newly captured 5,347 proxy-type addresses there.
Network usage types
The ratio of residential broadband to datacenter address space is the most direct indicator of what kind of proxy risk a region carries: a high datacenter share means datacenter proxies are more likely; a high residential share means home-broadband proxies and dial-up pools are.
| Usage type | Segments | Share |
|---|---|---|
| Residential broadband | 1,475 | 47.5% |
| Mobile network | 871 | 28.1% |
| Datacenter | 467 | 15.0% |
| Gateway / NAT egress | 189 | 6.1% |
| Education network | 63 | 2.0% |
| Government | 23 | 0.7% |
| CDN node | 14 | 0.5% |
| Organisation | 3 | 0.1% |
Regions
| Region | Segments | Share |
|---|---|---|
| Prague | 4,218 | 35.6% |
| Moravian-Silesian Region | 2,313 | 19.5% |
| Central Bohemia | 960 | 8.1% |
| South Moravian | 890 | 7.5% |
| Ústí nad Labem Region | 615 | 5.2% |
| Zlín | 393 | 3.3% |
| Praha | 298 | 2.5% |
| Olomouc Region | 277 | 2.3% |
| Vysocina | 270 | 2.3% |
| Hradec Králové Region | 246 | 2.1% |
| Liberec Region | 216 | 1.8% |
| Pardubice Region | 209 | 1.8% |
| South Bohemian Region | 206 | 1.7% |
| Kralovehradecky | 188 | 1.6% |
| Plzeň Region | 186 | 1.6% |
| Carlsbad Region | 89 | 0.8% |
| Praha, Hlavni mesto | 57 | 0.5% |
| Pardubicky | 42 | 0.4% |
| Plzensky | 40 | 0.3% |
| Olomoucky | 26 | 0.2% |
| Moravskoslezsky kraj | 23 | 0.2% |
| Ustecky | 22 | 0.2% |
| Jihocesky | 19 | 0.2% |
| Kralovehradecky kraj | 12 | 0.1% |
| Liberecky | 10 | 0.1% |
| Liberecky kraj | 6 | 0.1% |
| Karlovarsky | 4 | 0.0% |
| Moravskoslezsky | 3 | 0.0% |
| Zlin | 2 | 0.0% |
| Jihomoravsky kraj | 1 | 0.0% |
Cities
| City | Segments | Share |
|---|---|---|
| Prague | 4,275 | 36.1% |
| Ostrava | 1,568 | 13.2% |
| Brno | 492 | 4.2% |
| Chomutov | 183 | 1.5% |
| Příbram | 180 | 1.5% |
| Vysehrad | 175 | 1.5% |
| Chlumec nad Cidlinou | 166 | 1.4% |
| Olomouc | 127 | 1.1% |
| Zlín | 100 | 0.8% |
| Pilsen | 94 | 0.8% |
| Nový Jičín | 93 | 0.8% |
| Liberec | 90 | 0.8% |
| Hradec Králové | 85 | 0.7% |
| České Budějovice | 70 | 0.6% |
| Teplice | 67 | 0.6% |
| Jihlava | 66 | 0.6% |
| Mladá Boleslav | 66 | 0.6% |
| Karlin | 65 | 0.5% |
| Žatec | 62 | 0.5% |
| Frýdek-Místek | 61 | 0.5% |
Autonomous systems
An ASN identifies the operator of a network. Addresses under one ASN usually share risk characteristics, which is why risk controls often act on whole ASNs rather than single addresses. Operator names are not published here — the machine-readable identity is the ASN.
| ASN | Segments |
|---|---|
| AS16019 | 1,850 |
| AS5610 | 1,407 |
| AS13036 | 1,247 |
| AS210712 | 337 |
| AS30764 | 292 |
| AS16246 | 228 |
| AS47232 | 226 |
| AS29208 | 215 |
| AS2852 | 201 |
| AS28725 | 188 |
Look up a single address
Free, no signup: curl https://ip99.com/v1/ip/8.8.8.8 — see the API documentation.