AS18390 203.4.136.0/21 CIDR and IP Range Summary.ASN: 18390 - Spintel Pty LtdHost Count: 2046Addressable IPs: 2048203.4.136.0/24203.4.137.0/24203.4.138.0/24203.4.139.0/24203.4.140.0/24203.4.141.0/24203.4.142.0/24203.4.143.0/24