AS3257 193.163.208.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048193.163.208.0/24193.163.209.0/24193.163.210.0/24193.163.211.0/24193.163.212.0/24193.163.213.0/24193.163.214.0/24193.163.215.0/24