AS16509 15.221.144.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204815.221.144.0/2415.221.145.0/2415.221.146.0/2415.221.147.0/2415.221.148.0/2415.221.149.0/2415.221.150.0/2415.221.151.0/24