AS3257 208.67.16.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048208.67.16.0/24208.67.17.0/24208.67.18.0/24208.67.19.0/24208.67.20.0/24208.67.21.0/24208.67.22.0/24208.67.23.0/24