AS3257 72.37.208.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204872.37.208.0/2472.37.209.0/2472.37.210.0/2472.37.211.0/2472.37.212.0/2472.37.213.0/2472.37.214.0/2472.37.215.0/24