AS721 199.211.136.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048199.211.136.0/24199.211.137.0/24199.211.138.0/24199.211.139.0/24199.211.140.0/24199.211.141.0/24199.211.142.0/24199.211.143.0/24