AS4643 124.19.64.0/21 CIDR and IP Range Summary.ASN: 4643 - Optus Customer NetworkHost Count: 2046Addressable IPs: 2048124.19.64.0/24124.19.65.0/24124.19.66.0/24124.19.67.0/24124.19.68.0/24124.19.69.0/24124.19.70.0/24124.19.71.0/24