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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5610CZ | O2-CZECH-REPUBLIC O2 Czech Republic, a.s. | 2.3M | 72 |
| AS16019CZ | VODAFONE-CZ-AS Vodafone Czech Republic a.s. | 2.3M | 107 |
| AS13036CZ | TMOBILE-CZ T-Mobile Czech Republic a.s. | 992.3K | 37 |
| AS2852CZ | CESNET2 CESNET z.s.p.o. | 858.1K | 27 |
| AS44546CZ | ALFATELECOM-AS ALFA TELECOM s.r.o. | 526.8K | 11 |
| AS2571CZ | DHLNET - DHL Information Services (Europe) s.r.o | 438.5K | 100 |
| AS29208CZ | QUANTCOM-AS Quantcom, a.s. | 274.4K | 41 |
| AS28725CZ | CETIN-AS CETIN a.s. | 265.5K | 11 |
| AS30764CZ | PODA-AS PODA a.s. | 220.4K | 21 |
| AS42908CZ | CZ-NORDICTELECOMREGIONAL O2 Czech Republic, a.s. | 183.3K | 44 |
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.
714 autonomous systems registered to Czechia. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS52029CZ | ASNOVOSEDLY Palanet s.r.o. | 4.1K | — | 9 |
| AS198991CZ | TV_NOVA_SRO TV Nova sro | 4.1K | — | 1 |
| AS197846CZ | SAOCOMP-AS Radovan Ochvat trading as SAO Computers | 4.1K | — | 2 |
| AS57287CZ | OTAVANET-AS OtavaNet s.r.o. | 4.1K | 1 | 2 |
| AS56360CZ | MSTR-AS TRINITY CZECH REPUBLIC, s.r.o. | 4.1K | 524.3K | 2 |
| AS47868CZ | SUPRO-AS AVONET, s.r.o. | 4.1K | 65.5K | 3 |
| AS197277CZ | SUKL_AS State Institute for Drug Control | 4.1K | 65.5K | 4 |
| AS198101CZ | KOOPERATIVA-AS Kooperativa pojistovna, a.s., Vienna Insurance Group | 4.1K | 1M | 14 |
| AS39904CZ | MERIT-AS MERIT GROUP a.s | 4.1K | 65.5K | 4 |
| AS57496CZ | PRAHA1NET-AS Praha1.net z.s.p.o. | 4.1K | 65.5K | 3 |
| AS202682CZ | geetoo-cz Geetoo Technology s.r.o. | 3.8K | 589.8K | 11 |
| AS52154CZ | ASMJANIK mjanik.net s.r.o. | 3.8K | — | 8 |
| AS42422CZ | SECURITYNET-AS SecurityNet.cz s.r.o. | 3.8K | 65.5K | 14 |
| AS215704CZ | NGN-CZ NGN CZ s.r.o. | 3.8K | 524.3K | 7 |
| AS57707CZ | GREENDATA Greendata s.r.o. | 3.6K | 65.5K | 8 |
| AS207167CZ | amccomp-master-brno mapnet IT services s.r.o. | 3.6K | 589.8K | 7 |
| AS34911CZ | ASELDATA ELDATA prazska s.r.o. | 3.6K | — | 5 |
| AS197879CZ | HELAPC HelaPC s.r.o. | 3.3K | 1M | 5 |
| AS199657CZ | TOUSKOVNET TNtech, s.r.o. | 3.3K | 65.5K | 5 |
| AS49025CZ | PROZETA-NET PRO-ZETA a.s. | 3.3K | 4.1K | 8 |
| AS198161CZ | CZ-SUAS Sokolovska uhelna, pravni nastupce, a.s. | 3.1K | 65.5K | 3 |
| AS47317CZ | WEB4CE Web4ce, s.r.o. | 3.1K | 524.3K | 3 |
| AS62178CZ | Master_IT_Technologies MASTER IT Technologies, a.s. | 3.1K | 16.4K | 13 |
| AS59970CZ | AMIGONET AmigoNet s.r.o. | 3.1K | 1M | 5 |
| AS210139CZ | DPT DPT s.r.o. | 3.1K | 589.8K | 4 |
| AS57077CZ | AB-NET AB-NET s.r.o. | 3.1K | 65.5K | 3 |
| AS34955CZ | ASVICENIK Martin Vicenik | 3.1K | — | 12 |
| AS197046CZ | AS_FIXNET FIXNET s.r.o. | 3.1K | 65.5K | 3 |
| AS43037CZ | SEZNAM-CZ Seznam.cz, a.s. | 3.1K | 65.5K | 12 |
| AS56624CZ | ASRTYNENET Rtyne.net s.r.o. | 3.1K | — | 2 |
| AS203018CZ | Pamico PAMICO CZECH, s.r.o. | 3.1K | 524.3K | 3 |
| AS196861CZ | DIGIACT-AS DIGITAL ACTION s.r.o. | 3.1K | 65.5K | 3 |
| AS198167CZ | AppToCloud Apptc.me s.r.o. | 3.1K | 65.5K | 10 |
| AS56973CZ | VITSOL VITKOVICE IT SOLUTIONS a.s. | 3.1K | 256 | 3 |
| AS48364CZ | ACVYSKOV-AS Radim Pytela trading as AC Vyskov | 3.1K | 65.5K | 3 |
| AS43614CZ | ECONOMIA-CZ Economia a.s. | 3.1K | 65.5K | 3 |
| AS51424CZ | ASAGNET Jiri Sperl | 2.8K | — | 6 |
| AS60606CZ | Blindspot PRO-ZETA a.s. | 2.8K | 65.5K | 8 |
| AS21241CZ | MUZO-AS Global Payments Europe, s.r.o. | 2.8K | — | 3 |
| AS44712CZ | eHAMnet-AS eHAMnet, s.r.o. | 2.6K | 524.3K | 3 |
| AS47131CZ | PH PH, spol. s r. o. | 2.6K | — | 3 |
| AS204949CZ | CMIS CMIS s.r.o. | 2.6K | — | 7 |
| AS51331CZ | ModernTV SychrovNET s.r.o | 2.6K | 768 | 10 |
| AS52130CZ | ARTCOMPANYCZ Livesport s.r.o. | 2.6K | 1 | 3 |
| AS209369CZ | TCPRO The Cloud Provider s.r.o. | 2.6K | 589.8K | 7 |
| AS52058CZ | petrkovice_net za200.cz s.r.o. | 2.6K | — | 2 |
| AS198977CZ | UNART UnArtel s.r.o. | 2.6K | 262.1K | 3 |
| AS208414CZ | WEDOS-GLOBAL WEDOS Internet, a.s. | 2.6K | 103 | 113 |
| AS6881CZ | NIXCZ NIX.CZ z.s.p.o. | 2.3K | 65.5K | 3 |
| AS200449CZ | QRATOR-CZ Qrator Labs CZ s.r.o. | 2.3K | 13 | 22 |