AS3257 217.206.128.0/18 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 16382Addressable IPs: 16384217.206.128.0/24217.206.129.0/24217.206.130.0/24217.206.131.0/24217.206.132.0/24217.206.133.0/24217.206.134.0/24217.206.135.0/24217.206.136.0/24217.206.137.0/24217.206.138.0/24217.206.139.0/24217.206.140.0/24217.206.141.0/24217.206.142.0/24217.206.143.0/24217.206.144.0/24217.206.145.0/24217.206.146.0/24217.206.147.0/24217.206.148.0/24217.206.149.0/24217.206.150.0/24217.206.151.0/24217.206.152.0/24217.206.153.0/24217.206.154.0/24217.206.155.0/24217.206.156.0/24217.206.157.0/24217.206.158.0/24217.206.159.0/24217.206.160.0/24217.206.161.0/24217.206.162.0/24217.206.163.0/24217.206.164.0/24217.206.165.0/24217.206.166.0/24217.206.167.0/24217.206.168.0/24217.206.169.0/24217.206.170.0/24217.206.171.0/24217.206.172.0/24217.206.173.0/24217.206.174.0/24217.206.175.0/24217.206.176.0/24217.206.177.0/24217.206.178.0/24217.206.179.0/24217.206.180.0/24217.206.181.0/24217.206.182.0/24217.206.183.0/24217.206.184.0/24217.206.185.0/24217.206.186.0/24217.206.187.0/24217.206.188.0/24217.206.189.0/24217.206.190.0/24217.206.191.0/24