AS668 198.253.168.0/21 CIDR and IP Range Summary.ASN: 668 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048198.253.168.0/24198.253.169.0/24198.253.170.0/24198.253.171.0/24198.253.172.0/24198.253.173.0/24198.253.174.0/24198.253.175.0/24