AS199711 NCISA-AS National Cyber and Information Security Agency

NCISA-AS National Cyber and Information Security Agency · registered in Czechia

IPv4 addresses7682 prefixes · <0.001% of announced IPv4

Rank in Czechia#424largest network in CZ by IPv4 space, of 570 · <0.01% of CZ

Rank worldwide#42,708of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryCzechia599 ASNs registered there

Open AS199711 in ASN lookup Look up an IP in this network (185.48.21.1) All networks in Czechia

IPv4 prefixes

All 2 prefixes, in address order.

185.48.21.0/24
185.48.22.0/23

IPv6 prefixes

All 1 prefix.

2a01:95a0::/32

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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