AS721 143.73.64.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048143.73.64.0/24143.73.65.0/24143.73.66.0/24143.73.67.0/24143.73.68.0/24143.73.69.0/24143.73.70.0/24143.73.71.0/24