AS3257 131.176.216.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048131.176.216.0/24131.176.217.0/24131.176.218.0/24131.176.219.0/24131.176.220.0/24131.176.221.0/24131.176.222.0/24131.176.223.0/24