AS3257 209.120.248.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048209.120.248.0/24209.120.249.0/24209.120.250.0/24209.120.251.0/24209.120.252.0/24209.120.253.0/24209.120.254.0/24209.120.255.0/24