AS16509 54.192.168.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 204854.192.168.0/2454.192.169.0/2454.192.170.0/2454.192.171.0/2454.192.172.0/2454.192.173.0/2454.192.174.0/2454.192.175.0/24