AS3303 217.192.16.0/21 CIDR and IP Range Summary.ASN: 3303 - Swisscom (Schweiz) AGHost Count: 2046Addressable IPs: 2048217.192.16.0/24217.192.17.0/24217.192.18.0/24217.192.19.0/24217.192.20.0/24217.192.21.0/24217.192.22.0/24217.192.23.0/24