AS3257 66.54.144.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 409666.54.144.0/2466.54.145.0/2466.54.146.0/2466.54.147.0/2466.54.148.0/2466.54.149.0/2466.54.150.0/2466.54.151.0/2466.54.152.0/2466.54.153.0/2466.54.154.0/2466.54.155.0/2466.54.156.0/2466.54.157.0/2466.54.158.0/2466.54.159.0/24