AS3257 72.245.176.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204872.245.176.0/2472.245.177.0/2472.245.178.0/2472.245.179.0/2472.245.180.0/2472.245.181.0/2472.245.182.0/2472.245.183.0/24