AS721 143.81.96.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048143.81.96.0/24143.81.97.0/24143.81.98.0/24143.81.99.0/24143.81.100.0/24143.81.101.0/24143.81.102.0/24143.81.103.0/24