AS721 164.236.208.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048164.236.208.0/24164.236.209.0/24164.236.210.0/24164.236.211.0/24164.236.212.0/24164.236.213.0/24164.236.214.0/24164.236.215.0/24