AS21273 TEST-AS-Cust Swisscom (Schweiz) AG

TEST-AS-Cust Swisscom (Schweiz) AG · registered in Switzerland

IPv4 addresses7683 prefixes · <0.001% of announced IPv4

Rank in Switzerland#446largest network in CH by IPv4 space, of 741 · <0.01% of CH

Rank worldwide#43,306of 79,396 networks with IPv4

IPv62 x /482 prefixes

CountrySwitzerland783 ASNs registered there

Open AS21273 in ASN lookup Look up an IP in this network (193.5.252.1) All networks in Switzerland

IPv4 prefixes

All 3 prefixes, in address order.

193.5.252.0/24
194.209.118.0/24
212.243.54.0/24

IPv6 prefixes

All 2 prefixes.

2001:918:ff16::/48
2001:918:ff22::/48

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AS8982#448 Netcetera-Skopje-AS Netcetera AG768

AS20582#449 BeeOne Beeone Communications SA768

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