AS3257 216.133.64.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 4096216.133.64.0/24216.133.65.0/24216.133.66.0/24216.133.67.0/24216.133.68.0/24216.133.69.0/24216.133.70.0/24216.133.71.0/24216.133.72.0/24216.133.73.0/24216.133.74.0/24216.133.75.0/24216.133.76.0/24216.133.77.0/24216.133.78.0/24216.133.79.0/24