AS16509 99.77.136.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204899.77.136.0/2499.77.137.0/2499.77.138.0/2499.77.139.0/2499.77.140.0/2499.77.141.0/2499.77.142.0/2499.77.143.0/24