AS16509 3.163.0.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 20483.163.0.0/243.163.1.0/243.163.2.0/243.163.3.0/243.163.4.0/243.163.5.0/243.163.6.0/243.163.7.0/24