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How Czechia ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to Czechia over time.
The largest autonomous systems registered to Czechia by IPv4 footprint.
Czechia against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
715 autonomous systems registered to Czechia. Click an AS for detail.
| 14 |
| AS2571CZ | DHLNET - DHL Information Services (Europe) s.r.o | 438.5K | 101 |
| AS29208CZ | QUANTCOM-AS Quantcom, a.s. | 274.4K | 41 |
| AS28725CZ | CETIN-AS CETIN a.s. | 265.5K | 11 |
| AS30764CZ | PODA-AS PODA a.s. | 219.4K | 18 |
| AS42908CZ | CZ-NORDICTELECOMREGIONAL O2 Czech Republic, a.s. | 183.3K | 44 |
| 512 |
| — |
| 2 |
| AS202996CZ | Helkor Ondrej Vrana | 512 | 256 | 3 |
| AS215308CZ | DIMCZNET Spolek PASKOV.net | 512 | 65.5K | 3 |
| AS51521CZ | ASKMNET Resident Control Telco s.r.o. | 512 | — | 1 |
| AS25093CZ | CSAS-CZ Ceska sporitelna a.s. | 512 | — | 2 |
| AS42726CZ | BUSINESSCOM BusinessCom CZ spol. s r.o. | 512 | — | 2 |
| AS210915CZ | DOMINIKPASTO Dominik Pastorek | 512 | 10 | 5 |
| AS206785CZ | BRNO Magistrat mesta Brna | 512 | 1 | 3 |
| AS208712CZ | CENDIS CENDIS, s.p. | 512 | 1 | 2 |
| AS204668CZ | ASTANACZ ASTANA Technologies s.r.o. | 512 | 131.1K | 2 |
| AS60266CZ | EMBEDIT-AS EmbedIT s.r.o. | 512 | 65.6K | 7 |
| AS48131CZ | IXOXI IXOXI s.r.o. | 512 | 131.1K | 4 |
| AS3161CZ | ASITPROFI IT PROFI s.r.o. | 512 | — | 1 |
| AS21082CZ | AS-CZVP Reliable Communications s.r.o. | 512 | — | 2 |
| AS199220CZ | KRS-AS-CZ KrU Stredoceskeho kraje | 768 | 1 | 3 |
| AS204007CZ | Kleissner Kleissner Investments s.r.o. | 768 | 524.3K | 4 |
| AS204907CZ | AS204907 Air Bank a.s. | 768 | — | 3 |
| AS201931CZ | LBNET LBnet.cz s.r.o. | 768 | 65.5K | 3 |
| AS200806CZ | bee BOHEMIA ENERGY entity s.r.o. | 768 | — | 2 |
| AS202948CZ | PL-FORTUNA-GAME-DC FORTUNA GAME a.s. | 768 | — | 3 |
| AS200871CZ | rockawayx-eu RockawayX Infra s.r.o. | 768 | — | 3 |
| AS199711CZ | NCISA-AS National Cyber and Information Security Agency | 768 | 65.5K | 4 |
| AS43866CZ | ALTRON Altron a.s. | 768 | — | 2 |
| AS207095CZ | SK-FORTUNA-GAME FORTUNA GAME a.s. | 768 | — | 3 |
| AS203208CZ | CTU_AS4_2 Czech Telecommunication Office | 768 | 458.8K | 5 |
| AS219440CZ | FUNFIRST FunFirst s.r.o. | 768 | 2 | 4 |
| AS205910CZ | ASNEW McKinsey & Company Inc. | 768 | — | 3 |
| AS51661CZ | ALLSTARNET UVT Internet s.r.o. | 768 | — | 3 |
| AS62159CZ | ASHAPPY Happy Technik s.r.o. | 768 | — | 3 |
| AS197412CZ | ASBESKYDNET Jiri Tlapak | 768 | — | 3 |
| AS57472CZ | JRNET JR-NET, s.r.o. | 768 | 65.5K | 3 |
| AS201265CZ | ANAFRA-AS ANAFRA a.s. | 768 | 65.5K | 3 |
| AS30738CZ | NETART-AS NetArt Group s.r.o. | 768 | 65.5K | 5 |
| AS34596CZ | HVfree HVfree.net servis. s.r.o. | 768 | 524.3K | 4 |
| AS206613CZ | TIPSPORT-NET-AS Tipsport.net a.s. | 768 | 1 | 4 |
| AS208950CZ | ASEZPADASRO Ezpada s.r.o | 768 | — | 3 |
| AS206712CZ | FeldHost-AS FELDSAM s.r.o. | 768 | 196.6K | 6 |
| AS212315CZ | FTCZ-NET Frantisek Toman | 768 | 524.3K | 4 |
| AS47749CZ | ORIFLAME-AS ORIFLAME SOFTWARE s.r.o. | 1K | 1 | 4 |
| AS202874CZ | ZL-AS-CZ Zlinsky Kraj | 1K | 524.3K | 2 |
| AS200600CZ | SEZNAM-CZ-DC Seznam.cz datova centra, s.r.o. | 1K | 524.3K | 2 |
| AS207153CZ | cz-stream-it Stream-iT, s.r.o. | 1K | — | 1 |
| AS12344CZ | CZECHITC CZECH IT CLUSTER, druzstvo | 1K | 131.1K | 2 |
| AS199490CZ | INTERCONNECT INTERCONNECT s.r.o. | 1K | 65.5K | 2 |
| AS202872CZ | KMENET KME, spol. s r. o. | 1K | 65.5K | 3 |
| AS210111CZ | netcraftsolutions Netcraft Solutions s.r.o. | 1K | 524.3K | 2 |
| AS44770CZ | SAVVY-AS Savvy s.r.o. | 1K | 1 | 2 |