AS3257 66.54.168.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204866.54.168.0/2466.54.169.0/2466.54.170.0/2466.54.171.0/2466.54.172.0/2466.54.173.0/2466.54.174.0/2466.54.175.0/24