AS16509 143.204.240.0/21 CIDR and IP Range Summary.ASN: 16509 - Amazon.com Inc.Host Count: 2046Addressable IPs: 2048143.204.240.0/24143.204.241.0/24143.204.242.0/24143.204.243.0/24143.204.244.0/24143.204.245.0/24143.204.246.0/24143.204.247.0/24