AS721 143.249.40.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048143.249.40.0/24143.249.41.0/24143.249.42.0/24143.249.43.0/24143.249.44.0/24143.249.45.0/24143.249.46.0/24143.249.47.0/24