AS721 143.81.120.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048143.81.120.0/24143.81.121.0/24143.81.122.0/24143.81.123.0/24143.81.124.0/24143.81.125.0/24143.81.126.0/24143.81.127.0/24