AS213298 CTX-BRN-AS Cortex IT SA

CTX-BRN-AS Cortex IT SA · registered in Switzerland

IPv4 addresses2,0481 prefixes · <0.001% of announced IPv4

Rank in Switzerland#234largest network in CH by IPv4 space, of 741 · 0.01% of CH

Rank worldwide#21,890of 79,396 networks with IPv4

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

CountrySwitzerland783 ASNs registered there

Open AS213298 in ASN lookup Look up an IP in this network (5.187.56.1) All networks in Switzerland

IPv4 prefixes

All 1 prefix, in address order.

5.187.56.0/21

IPv6 prefixes

All 1 prefix.

2a01:41c0::/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