AS16509 52.218.136.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204852.218.136.0/2452.218.137.0/2452.218.138.0/2452.218.139.0/2452.218.140.0/2452.218.141.0/2452.218.142.0/2452.218.143.0/24