AS3257 216.132.232.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048216.132.232.0/24216.132.233.0/24216.132.234.0/24216.132.235.0/24216.132.236.0/24216.132.237.0/24216.132.238.0/24216.132.239.0/24