AS721 6.64.48.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 20486.64.48.0/246.64.49.0/246.64.50.0/246.64.51.0/246.64.52.0/246.64.53.0/246.64.54.0/246.64.55.0/24