AS3257 76.74.80.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204876.74.80.0/2476.74.81.0/2476.74.82.0/2476.74.83.0/2476.74.84.0/2476.74.85.0/2476.74.86.0/2476.74.87.0/24