AS3257 23.230.56.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204823.230.56.0/2423.230.57.0/2423.230.58.0/2423.230.59.0/2423.230.60.0/2423.230.61.0/2423.230.62.0/2423.230.63.0/24