AS721 138.157.232.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048138.157.232.0/24138.157.233.0/24138.157.234.0/24138.157.235.0/24138.157.236.0/24138.157.237.0/24138.157.238.0/24138.157.239.0/24