AS3257 213.228.224.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 4096213.228.224.0/24213.228.225.0/24213.228.226.0/24213.228.227.0/24213.228.228.0/24213.228.229.0/24213.228.230.0/24213.228.231.0/24213.228.232.0/24213.228.233.0/24213.228.234.0/24213.228.235.0/24213.228.236.0/24213.228.237.0/24213.228.238.0/24213.228.239.0/24