AS3257 64.81.80.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 409664.81.80.0/2464.81.81.0/2464.81.82.0/2464.81.83.0/2464.81.84.0/2464.81.85.0/2464.81.86.0/2464.81.87.0/2464.81.88.0/2464.81.89.0/2464.81.90.0/2464.81.91.0/2464.81.92.0/2464.81.93.0/2464.81.94.0/2464.81.95.0/24