AS198433 CFS CKW Fiber Services AG

CFS CKW Fiber Services AG · registered in Switzerland

IPv4 addresses7,6809 prefixes · <0.001% of announced IPv4

Rank in Switzerland#117largest network in CH by IPv4 space, of 741 · 0.05% of CH

Rank worldwide#11,083of 79,396 networks with IPv4

IPv61 x /32 (65,537 x /48)2 prefixes

CountrySwitzerland783 ASNs registered there

Open AS198433 in ASN lookup Look up an IP in this network (31.40.236.1) All networks in Switzerland

IPv4 prefixes

All 9 prefixes, in address order.

31.40.236.0/23
37.128.176.0/21
45.9.163.0/24
87.117.120.0/21
89.200.220.0/22
185.80.64.0/22
193.135.219.0/24
195.225.60.0/24
203.1.19.0/24

IPv6 prefixes

All 2 prefixes.

2a00:82c0::/32
2a0b:4200:2001::/48

Similar-sized networks in Switzerland

ASNNameIPv4 addresses

AS28859#114 ZUGERNET Convotis Schweiz AG7,936

AS16267#115 CH Regionalmedien AG7,936

AS60016#116 ASFS3 Fiberstream 87 AG7,936

AS21217#118 SAFEHOSTNET Infrastructure Switzerland Colo Sarl7,680

AS210602#119 marbell Marbell AG7,680

AS35793#120 acronis Acronis International GmbH7,424

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