AS721 6.50.56.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 20486.50.56.0/246.50.57.0/246.50.58.0/246.50.59.0/246.50.60.0/246.50.61.0/246.50.62.0/246.50.63.0/24