AS3257 64.50.128.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 409664.50.128.0/2464.50.129.0/2464.50.130.0/2464.50.131.0/2464.50.132.0/2464.50.133.0/2464.50.134.0/2464.50.135.0/2464.50.136.0/2464.50.137.0/2464.50.138.0/2464.50.139.0/2464.50.140.0/2464.50.141.0/2464.50.142.0/2464.50.143.0/24