AS721 143.74.8.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048143.74.8.0/24143.74.9.0/24143.74.10.0/24143.74.11.0/24143.74.12.0/24143.74.13.0/24143.74.14.0/24143.74.15.0/24