AS721 55.50.200.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 204855.50.200.0/2455.50.201.0/2455.50.202.0/2455.50.203.0/2455.50.204.0/2455.50.205.0/2455.50.206.0/2455.50.207.0/24