AS9519 203.188.216.0/21 CIDR and IP Range Summary.ASN: 9519 - VERTELNET Vertical Telecoms Pty LtdHost Count: 2046Addressable IPs: 2048203.188.216.0/24203.188.217.0/24203.188.218.0/24203.188.219.0/24203.188.220.0/24203.188.221.0/24203.188.222.0/24203.188.223.0/24