AS3257 72.37.248.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204872.37.248.0/2472.37.249.0/2472.37.250.0/2472.37.251.0/2472.37.252.0/2472.37.253.0/2472.37.254.0/2472.37.255.0/24