AS15147 216.81.80.0/20 CIDR and IP Range Summary.ASN: 15147 - Department of Homeland SecurityHost Count: 4094Addressable IPs: 4096216.81.80.0/24216.81.81.0/24216.81.82.0/24216.81.83.0/24216.81.84.0/24216.81.85.0/24216.81.86.0/24216.81.87.0/24216.81.88.0/24216.81.89.0/24216.81.90.0/24216.81.91.0/24216.81.92.0/24216.81.93.0/24216.81.94.0/24216.81.95.0/24