AS3257 204.237.144.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 4096204.237.144.0/24204.237.145.0/24204.237.146.0/24204.237.147.0/24204.237.148.0/24204.237.149.0/24204.237.150.0/24204.237.151.0/24204.237.152.0/24204.237.153.0/24204.237.154.0/24204.237.155.0/24204.237.156.0/24204.237.157.0/24204.237.158.0/24204.237.159.0/24