AS39 199.121.72.0/21 CIDR and IP Range Summary.ASN: 39 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048199.121.72.0/24199.121.73.0/24199.121.74.0/24199.121.75.0/24199.121.76.0/24199.121.77.0/24199.121.78.0/24199.121.79.0/24