AS3257 66.17.240.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204866.17.240.0/2466.17.241.0/2466.17.242.0/2466.17.243.0/2466.17.244.0/2466.17.245.0/2466.17.246.0/2466.17.247.0/24