AS721 199.211.248.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048199.211.248.0/24199.211.249.0/24199.211.250.0/24199.211.251.0/24199.211.252.0/24199.211.253.0/24199.211.254.0/24199.211.255.0/24