AS721 55.91.32.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 204855.91.32.0/2455.91.33.0/2455.91.34.0/2455.91.35.0/2455.91.36.0/2455.91.37.0/2455.91.38.0/2455.91.39.0/24