AS3257 66.7.172.72/29 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 6Addressable IPs: 8 66.7.172.7366.7.172.7466.7.172.7566.7.172.7666.7.172.7766.7.172.7866.7.172.7966.7.172.80