AS3257 72.37.192.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204872.37.192.0/2472.37.193.0/2472.37.194.0/2472.37.195.0/2472.37.196.0/2472.37.197.0/2472.37.198.0/2472.37.199.0/24