AS7474 146.144.0.0/21 CIDR and IP Range Summary.ASN: 7474 - SingTel Optus Pty LtdHost Count: 2046Addressable IPs: 2048146.144.0.0/24146.144.1.0/24146.144.2.0/24146.144.3.0/24146.144.4.0/24146.144.5.0/24146.144.6.0/24146.144.7.0/24