AS16509 18.238.128.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204818.238.128.0/2418.238.129.0/2418.238.130.0/2418.238.131.0/2418.238.132.0/2418.238.133.0/2418.238.134.0/2418.238.135.0/24