AS721 199.211.72.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048199.211.72.0/24199.211.73.0/24199.211.74.0/24199.211.75.0/24199.211.76.0/24199.211.77.0/24199.211.78.0/24199.211.79.0/24