AS3257 216.254.8.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048216.254.8.0/24216.254.9.0/24216.254.10.0/24216.254.11.0/24216.254.12.0/24216.254.13.0/24216.254.14.0/24216.254.15.0/24