AS3257 217.206.232.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048217.206.232.0/24217.206.233.0/24217.206.234.0/24217.206.235.0/24217.206.236.0/24217.206.237.0/24217.206.238.0/24217.206.239.0/24