AS21633 161.160.128.0/19 CIDR and IP Range Summary.ASN: 21633 - U.S. Department of the InteriorHost Count: 8190Addressable IPs: 8192161.160.128.0/24161.160.129.0/24161.160.130.0/24161.160.131.0/24161.160.132.0/24161.160.133.0/24161.160.134.0/24161.160.135.0/24161.160.136.0/24161.160.137.0/24161.160.138.0/24161.160.139.0/24161.160.140.0/24161.160.141.0/24161.160.142.0/24161.160.143.0/24161.160.144.0/24161.160.145.0/24161.160.146.0/24161.160.147.0/24161.160.148.0/24161.160.149.0/24161.160.150.0/24161.160.151.0/24161.160.152.0/24161.160.153.0/24161.160.154.0/24161.160.155.0/24161.160.156.0/24161.160.157.0/24161.160.158.0/24161.160.159.0/24