AS3303 212.243.136.0/21 CIDR and IP Range Summary.ASN: 3303 - Swisscom (Schweiz) AGHost Count: 2046Addressable IPs: 2048212.243.136.0/24212.243.137.0/24212.243.138.0/24212.243.139.0/24212.243.140.0/24212.243.141.0/24212.243.142.0/24212.243.143.0/24