AS16509 3.164.240.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 20483.164.240.0/243.164.241.0/243.164.242.0/243.164.243.0/243.164.244.0/243.164.245.0/243.164.246.0/243.164.247.0/24