AS16509 3.161.72.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 20483.161.72.0/243.161.73.0/243.161.74.0/243.161.75.0/243.161.76.0/243.161.77.0/243.161.78.0/243.161.79.0/24