AS721 138.157.144.0/20 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 4094Addressable IPs: 4096138.157.144.0/24138.157.145.0/24138.157.146.0/24138.157.147.0/24138.157.148.0/24138.157.149.0/24138.157.150.0/24138.157.151.0/24138.157.152.0/24138.157.153.0/24138.157.154.0/24138.157.155.0/24138.157.156.0/24138.157.157.0/24138.157.158.0/24138.157.159.0/24