AS3257 194.77.136.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048194.77.136.0/24194.77.137.0/24194.77.138.0/24194.77.139.0/24194.77.140.0/24194.77.141.0/24194.77.142.0/24194.77.143.0/24