AS3257 87.86.64.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204887.86.64.0/2487.86.65.0/2487.86.66.0/2487.86.67.0/2487.86.68.0/2487.86.69.0/2487.86.70.0/2487.86.71.0/24