AS4643 203.202.96.0/21 CIDR and IP Range Summary.ASN: 4643 - Optus Customer NetworkHost Count: 2046Addressable IPs: 2048203.202.96.0/24203.202.97.0/24203.202.98.0/24203.202.99.0/24203.202.100.0/24203.202.101.0/24203.202.102.0/24203.202.103.0/24