AS3257 72.13.244.0/28 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 14Addressable IPs: 16 72.13.244.172.13.244.272.13.244.372.13.244.472.13.244.572.13.244.672.13.244.772.13.244.872.13.244.972.13.244.1072.13.244.1172.13.244.1272.13.244.1372.13.244.1472.13.244.1572.13.244.16