AS3257 66.227.72.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204866.227.72.0/2466.227.73.0/2466.227.74.0/2466.227.75.0/2466.227.76.0/2466.227.77.0/2466.227.78.0/2466.227.79.0/24