AS211274 QCZ Quadruple a.s.

QCZ Quadruple a.s. · registered in Czechia

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Czechia#494largest network in CZ by IPv4 space, of 570 · <0.01% of CZ

Rank worldwide#59,025of 79,396 networks with IPv4

IPv64 x /32 (262,144 x /48)2 prefixes

CountryCzechia599 ASNs registered there

Open AS211274 in ASN lookup Look up an IP in this network (193.56.11.1) All networks in Czechia

IPv4 prefixes

All 1 prefix, in address order.

193.56.11.0/24

IPv6 prefixes

All 2 prefixes.

2a0b:4742::/31
2a0b:4746::/31

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AS201594#496 CTU_AS4 Czech Telecommunication Office256

AS203299#497 IHNET NetX Networks a.s.256

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources