AS21536 199.16.224.0/21 CIDR and IP Range Summary.ASN: 21536 - Millennium Pharmacy Systems Inc.Host Count: 2046Addressable IPs: 2048199.16.224.0/24199.16.225.0/24199.16.226.0/24199.16.227.0/24199.16.228.0/24199.16.229.0/24199.16.230.0/24199.16.231.0/24