AS3257 87.86.176.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204887.86.176.0/2487.86.177.0/2487.86.178.0/2487.86.179.0/2487.86.180.0/2487.86.181.0/2487.86.182.0/2487.86.183.0/24