AS204394 CORTEX Cortex, a.s.

CORTEX Cortex, a.s. · registered in Czechia

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4

Rank in Czechia#312largest network in CZ by IPv4 space, of 570 · 0.01% of CZ

Rank worldwide#29,977of 79,396 networks with IPv4

IPv68 x /32 (524,288 x /48)1 prefixes

CountryCzechia599 ASNs registered there

Open AS204394 in ASN lookup Look up an IP in this network (185.250.100.1) All networks in Czechia

IPv4 prefixes

All 1 prefix, in address order.

185.250.100.0/22

IPv6 prefixes

All 1 prefix.

2a0e:e580::/29

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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