AS16509 18.239.128.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204818.239.128.0/2418.239.129.0/2418.239.130.0/2418.239.131.0/2418.239.132.0/2418.239.133.0/2418.239.134.0/2418.239.135.0/24