AS721 199.208.40.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048199.208.40.0/24199.208.41.0/24199.208.42.0/24199.208.43.0/24199.208.44.0/24199.208.45.0/24199.208.46.0/24199.208.47.0/24