AS17647 203.12.72.0/21 CIDR and IP Range Summary.ASN: 17647 - CSC AustraliaHost Count: 2046Addressable IPs: 2048203.12.72.0/24203.12.73.0/24203.12.74.0/24203.12.75.0/24203.12.76.0/24203.12.77.0/24203.12.78.0/24203.12.79.0/24