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Cumulative IPv4, IPv6, and ASN allocations to Czechia over time.
Share of announced address space covered by valid Route Origin Authorizations.
714 autonomous systems registered to Czechia. Click an AS for detail.
| 858.4K |
| 524.3K |
| 28 |
| AS44546CZ | ALFATELECOM-AS ALFA TELECOM s.r.o. | 526.8K | — | 11 |
| AS2571CZ | DHLNET - DHL Information Services (Europe) s.r.o | 438.5K | 90 | 100 |
| AS29208CZ | QUANTCOM-AS Quantcom, a.s. | 274.4K | 262.1K | 41 |
| AS28725CZ | CETIN-AS CETIN a.s. | 265.2K | 589.8K | 10 |
| AS30764CZ | PODA-AS PODA a.s. | 220.4K | 131.1K | 21 |
| AS42908CZ | CZ-NORDICTELECOMREGIONAL O2 Czech Republic, a.s. | 183.3K | 2.4M | 44 |
| AS16246CZ | AS16246 O2 Czech Republic, a.s. | 133.1K | 589.8K | 15 |
| AS25512CZ | CDT-AS CD-Telematika a.s. | 117.8K | 65.5K | 12 |
| AS15425CZ | COMA PODA a.s. | 110.6K | 65.5K | 9 |
| AS25248CZ | BlueTone-AS RADIOKOMUNIKACE a.s. | 106.8K | 65.5K | 7 |
| AS5588CZ | GTSCE T-Mobile Czech Republic a.s. | 79.1K | 131.1K | 25 |
| AS44489CZ | Starnet STARNET, s.r.o. | 77.3K | 2.3M | 33 |
| AS197451CZ | VUTBR-AS Brno University of Technology | 67.6K | 852K | 12 |
| AS31246CZ | NETBOX-AS O2 Czech Republic, a.s. | 66.6K | 655.4K | 7 |
| AS24971CZ | MASTER-AS MasterDC s.r.o. | 58.9K | 1.4M | 46 |
| AS12570CZ | ITSELF O2 Czech Republic, a.s. | 53.8K | 589.8K | 13 |
| AS41046CZ | NEJTV-AS O2 Czech Republic, a.s. | 53.2K | 524.3K | 10 |
| AS15935CZ | HA-VEL-LOCAL-AS ha-vel internet s.r.o. | 51.2K | 65.5K | 17 |
| AS24806CZ | INTERNET-CZ INTERNET CZ, a.s. | 45.8K | 65.5K | 12 |
| AS6740CZ | INEXT-CZ-ADA CEZNET s.r.o. | 42K | — | 4 |
| AS21430CZ | WIA-AS WIA spol. s.r.o. | 41.7K | 65.5K | 71 |
| AS39906CZ | COPROSYS CoProSys a.s. | 37.9K | 65.5K | 13 |
| AS25424CZ | INEXT-CZ CEZNET s.r.o. | 33.8K | 1M | 9 |
| AS39392CZ | SuperNetwork SH.cz s.r.o. | 32.5K | 1.1M | 17 |
| AS15685CZ | CASABLANCA-AS CASABLANCA INT a.s. | 31.7K | 65.5K | 60 |
| AS9080CZ | GIN Ipex A.S | 26.6K | 65.5K | 6 |
| AS43709CZ | SILESNET SilesNet s.r.o. | 24.6K | 196.6K | 14 |
| AS35592CZ | COOLHOUSING-AS Coolhousing s.r.o. | 23.3K | 65.5K | 35 |
| AS50698CZ | TETA TETA s.r.o. | 22.5K | 1M | 12 |
| AS29134CZ | IGNUM-AS Webglobe, s.r.o. | 20.7K | 200.7K | 16 |
| AS51420CZ | CYRILEK-AS cyrilek.net z.s. | 20.5K | — | 18 |
| AS204666CZ | czjiritlapak Jiri Tlapak | 20.5K | 3.7M | 46 |
| AS42306CZ | EDERA_Group Edera Group a.s. | 20.5K | 2.1M | 12 |
| AS15614CZ | Dragon Dragon Internet a.s. | 20K | 524.3K | 7 |
| AS24641CZ | FASTER-AS FASTER CZ spol. s r.o. | 18.9K | 131.1K | 14 |
| AS39791CZ | TPS-AS Telco Pro Services, a. s. | 18.7K | 65.5K | 5 |
| AS43541CZ | VSHOSTING VSHosting s.r.o. | 18.4K | 655.4K | 22 |
| AS49985CZ | IP4ISP IP4ISP z.s.p.o | 17.9K | 65.5K | 7 |
| AS8251CZ | NFX_ZSPO FreeTel, s.r.o. | 17.4K | 65.5K | 7 |
| AS61296CZ | TechCom-AS TechCom s.r.o. | 17.4K | 65.5K | 3 |
| AS196735CZ | AS-JONCZ PODA a.s. | 16.6K | 65.5K | 3 |
| AS20723CZ | MGI AVONET, s.r.o. | 16.4K | 524.3K | 8 |
| AS49101CZ | KTCT-ASN CEZNET s.r.o. | 16.4K | 131.1K | 4 |
| AS196822CZ | SELECTSYSTEM-AS SELECT SYSTEM, s.r.o. | 16.4K | 65.5K | 2 |
| AS197197CZ | M-NET CETIN a.s. | 16.4K | 65.5K | 2 |
| AS210712CZ | GRAPESC-ISP ISP Alliance a.s. | 15.6K | 262.1K | 13 |