AS3257 68.64.176.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204868.64.176.0/2468.64.177.0/2468.64.178.0/2468.64.179.0/2468.64.180.0/2468.64.181.0/2468.64.182.0/2468.64.183.0/24