AS16509 54.240.168.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204854.240.168.0/2454.240.169.0/2454.240.170.0/2454.240.171.0/2454.240.172.0/2454.240.173.0/2454.240.174.0/2454.240.175.0/24