AS16509 15.221.8.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204815.221.8.0/2415.221.9.0/2415.221.10.0/2415.221.11.0/2415.221.12.0/2415.221.13.0/2415.221.14.0/2415.221.15.0/24