AS3257 66.17.80.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204866.17.80.0/2466.17.81.0/2466.17.82.0/2466.17.83.0/2466.17.84.0/2466.17.85.0/2466.17.86.0/2466.17.87.0/24