AS3257 216.133.104.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048216.133.104.0/24216.133.105.0/24216.133.106.0/24216.133.107.0/24216.133.108.0/24216.133.109.0/24216.133.110.0/24216.133.111.0/24