AS3257 64.6.168.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204864.6.168.0/2464.6.169.0/2464.6.170.0/2464.6.171.0/2464.6.172.0/2464.6.173.0/2464.6.174.0/2464.6.175.0/24