AS3257 66.17.208.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204866.17.208.0/2466.17.209.0/2466.17.210.0/2466.17.211.0/2466.17.212.0/2466.17.213.0/2466.17.214.0/2466.17.215.0/24