AS721 147.104.248.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048147.104.248.0/24147.104.249.0/24147.104.250.0/24147.104.251.0/24147.104.252.0/24147.104.253.0/24147.104.254.0/24147.104.255.0/24