AS3257 87.83.216.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204887.83.216.0/2487.83.217.0/2487.83.218.0/2487.83.219.0/2487.83.220.0/2487.83.221.0/2487.83.222.0/2487.83.223.0/24