AS721 199.251.104.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048199.251.104.0/24199.251.105.0/24199.251.106.0/24199.251.107.0/24199.251.108.0/24199.251.109.0/24199.251.110.0/24199.251.111.0/24