AS3257 66.167.64.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204866.167.64.0/2466.167.65.0/2466.167.66.0/2466.167.67.0/2466.167.68.0/2466.167.69.0/2466.167.70.0/2466.167.71.0/24