AS3257 64.81.48.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 409664.81.48.0/2464.81.49.0/2464.81.50.0/2464.81.51.0/2464.81.52.0/2464.81.53.0/2464.81.54.0/2464.81.55.0/2464.81.56.0/2464.81.57.0/2464.81.58.0/2464.81.59.0/2464.81.60.0/2464.81.61.0/2464.81.62.0/2464.81.63.0/24