AS3257 213.228.208.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 4096213.228.208.0/24213.228.209.0/24213.228.210.0/24213.228.211.0/24213.228.212.0/24213.228.213.0/24213.228.214.0/24213.228.215.0/24213.228.216.0/24213.228.217.0/24213.228.218.0/24213.228.219.0/24213.228.220.0/24213.228.221.0/24213.228.222.0/24213.228.223.0/24