AS577 72.28.64.0/21 CIDR and IP Range Summary.ASN: 577 - Bell CanadaHost Count: 2046Addressable IPs: 204872.28.64.0/2472.28.65.0/2472.28.66.0/2472.28.67.0/2472.28.68.0/2472.28.69.0/2472.28.70.0/2472.28.71.0/24