AS20701 CZNIC-AS3 CZ.NIC, z.s.p.o.

CZNIC-AS3 CZ.NIC, z.s.p.o. · registered in Czechia

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in Czechia#450largest network in CZ by IPv4 space, of 570 · <0.01% of CZ

Rank worldwide#48,014of 79,396 networks with IPv4

IPv62 x /481 prefixes

CountryCzechia599 ASNs registered there

Open AS20701 in ASN lookup Look up an IP in this network (185.43.135.1) All networks in Czechia

IPv4 prefixes

All 2 prefixes, in address order.

185.43.135.0/24
193.17.47.0/24

IPv6 prefixes

All 1 prefix.

2001:148f:fffe::/47

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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