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Czechia IP address ranges and ISPs

The IPv4 addresses assigned to Czechia and the ISPs and data centers holding the most of them. Use it to see which network a visitor from this country came through.

Czechia CZ

IPv4 addresses

8,368,607 addresses

Networks (ASN)

744

Known VPN servers

6

Tor exit nodes

9

Networks with the most addresses

ASNNameTypeAddresses here
AS5610O2 Czech Republic, a.s.ISP1,524,752 addresses
AS16019Vodafone Czech Republic a.s.ISP1,208,320 addresses
AS13036T-Mobile Czech Republic a.s.ISP989,244 addresses
AS2852CESNET z.s.p.o.ISP849,920 addresses
AS29208Quantcom, a.s.ISP263,812 addresses
AS30764PODA a.s.ISP218,112 addresses
AS42908O2 Czech Republic, a.s.ISP183,296 addresses
AS28725CETIN a.s.ISP134,400 addresses
AS16246O2 Czech Republic, a.s.ISP133,120 addresses
AS25512CD-Telematika a.s.ISP117,248 addresses
AS15425PODA a.s.ISP110,592 addresses
AS25248RADIOKOMUNIKACE a.s.ISP106,752 addresses
AS44546ALFA TELECOM s.r.o.ISP82,432 addresses
AS2571DHL Information Services (Europe) s.r.oISP70,912 addresses
AS197451Brno University of TechnologyISP66,816 addresses
AS31246O2 Czech Republic, a.s.ISP66,560 addresses
AS44489STARNET, s.r.o.ISP64,768 addresses
AS24971MasterDC s.r.o.Data center57,800 addresses
AS15935ha-vel internet s.r.o.ISP49,920 addresses
AS12570O2 Czech Republic, a.s.ISP48,896 addresses
AS24806INTERNET CZ, a.s.ISP44,800 addresses
AS6740CEZNET s.r.o.ISP41,984 addresses
AS21430WIA spol. s.r.o.ISP41,216 addresses
AS39906CoProSys a.s.ISP33,792 addresses
AS25424CEZNET s.r.o.ISP33,792 addresses
AS41046O2 Czech Republic, a.s.ISP32,768 addresses
AS15685CASABLANCA INT a.s.ISP31,232 addresses
AS39392SH.cz s.r.o.Data center30,428 addresses
AS9080Ipex Ltd.ISP26,368 addresses
AS42306Edera Group a.s.ISP20,480 addresses

Country facts

Capital
Prague
Currency
Czech Koruna (CZK)
Calling code
+420
Languages
Czech

Data: DB-IP (CC BY 4.0), public VPN server list, Tor Project · as of 2026-10-12 · Other countries