AS721 206.37.216.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048206.37.216.0/24206.37.217.0/24206.37.218.0/24206.37.219.0/24206.37.220.0/24206.37.221.0/24206.37.222.0/24206.37.223.0/24