AS16509 18.238.192.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204818.238.192.0/2418.238.193.0/2418.238.194.0/2418.238.195.0/2418.238.196.0/2418.238.197.0/2418.238.198.0/2418.238.199.0/24