AS721 206.39.48.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048206.39.48.0/24206.39.49.0/24206.39.50.0/24206.39.51.0/24206.39.52.0/24206.39.53.0/24206.39.54.0/24206.39.55.0/24