AS16509 18.239.144.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204818.239.144.0/2418.239.145.0/2418.239.146.0/2418.239.147.0/2418.239.148.0/2418.239.149.0/2418.239.150.0/2418.239.151.0/24