AS3257 67.199.152.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 204867.199.152.0/2467.199.153.0/2467.199.154.0/2467.199.155.0/2467.199.156.0/2467.199.157.0/2467.199.158.0/2467.199.159.0/24