AS16509 99.83.136.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204899.83.136.0/2499.83.137.0/2499.83.138.0/2499.83.139.0/2499.83.140.0/2499.83.141.0/2499.83.142.0/2499.83.143.0/24