AS27521 64.39.72.0/21 CIDR and IP Range Summary.ASN: 27521 - Catcomm Internet Services LLCHost Count: 2046Addressable IPs: 204864.39.72.0/2464.39.73.0/2464.39.74.0/2464.39.75.0/2464.39.76.0/2464.39.77.0/2464.39.78.0/2464.39.79.0/24