AS4643 203.16.103.0/24 CIDR and IP Range Summary.ASN: 4643 - Optus Customer NetworkHost Count: 254Addressable IPs: 256 203.16.103.0203.16.103.1203.16.103.2203.16.103.3203.16.103.4203.16.103.5203.16.103.6203.16.103.7203.16.103.8203.16.103.9203.16.103.10203.16.103.11203.16.103.12203.16.103.13203.16.103.14203.16.103.15203.16.103.16203.16.103.17203.16.103.18203.16.103.19203.16.103.20203.16.103.21203.16.103.22203.16.103.23203.16.103.24203.16.103.25203.16.103.26203.16.103.27203.16.103.28203.16.103.29203.16.103.30203.16.103.31203.16.103.32203.16.103.33203.16.103.34203.16.103.35203.16.103.36203.16.103.37203.16.103.38203.16.103.39203.16.103.40203.16.103.41203.16.103.42203.16.103.43203.16.103.44203.16.103.45203.16.103.46203.16.103.47203.16.103.48203.16.103.49203.16.103.50203.16.103.51203.16.103.52203.16.103.53203.16.103.54203.16.103.55203.16.103.56203.16.103.57203.16.103.58203.16.103.59203.16.103.60203.16.103.61203.16.103.62203.16.103.63203.16.103.64203.16.103.65203.16.103.66203.16.103.67203.16.103.68203.16.103.69203.16.103.70203.16.103.71203.16.103.72203.16.103.73203.16.103.74203.16.103.75203.16.103.76203.16.103.77203.16.103.78203.16.103.79203.16.103.80203.16.103.81203.16.103.82203.16.103.83203.16.103.84203.16.103.85203.16.103.86203.16.103.87203.16.103.88203.16.103.89203.16.103.90203.16.103.91203.16.103.92203.16.103.93203.16.103.94203.16.103.95203.16.103.96203.16.103.97203.16.103.98203.16.103.99203.16.103.100203.16.103.101203.16.103.102203.16.103.103203.16.103.104203.16.103.105203.16.103.106203.16.103.107203.16.103.108203.16.103.109203.16.103.110203.16.103.111203.16.103.112203.16.103.113203.16.103.114203.16.103.115203.16.103.116203.16.103.117203.16.103.118203.16.103.119203.16.103.120203.16.103.121203.16.103.122203.16.103.123203.16.103.124203.16.103.125203.16.103.126203.16.103.127203.16.103.128203.16.103.129203.16.103.130203.16.103.131203.16.103.132203.16.103.133203.16.103.134203.16.103.135203.16.103.136203.16.103.137203.16.103.138203.16.103.139203.16.103.140203.16.103.141203.16.103.142203.16.103.143203.16.103.144203.16.103.145203.16.103.146203.16.103.147203.16.103.148203.16.103.149203.16.103.150203.16.103.151203.16.103.152203.16.103.153203.16.103.154203.16.103.155203.16.103.156203.16.103.157203.16.103.158203.16.103.159203.16.103.160203.16.103.161203.16.103.162203.16.103.163203.16.103.164203.16.103.165203.16.103.166203.16.103.167203.16.103.168203.16.103.169203.16.103.170203.16.103.171203.16.103.172203.16.103.173203.16.103.174203.16.103.175203.16.103.176203.16.103.177203.16.103.178203.16.103.179203.16.103.180203.16.103.181203.16.103.182203.16.103.183203.16.103.184203.16.103.185203.16.103.186203.16.103.187203.16.103.188203.16.103.189203.16.103.190203.16.103.191203.16.103.192203.16.103.193203.16.103.194203.16.103.195203.16.103.196203.16.103.197203.16.103.198203.16.103.199203.16.103.200203.16.103.201203.16.103.202203.16.103.203203.16.103.204203.16.103.205203.16.103.206203.16.103.207203.16.103.208203.16.103.209203.16.103.210203.16.103.211203.16.103.212203.16.103.213203.16.103.214203.16.103.215203.16.103.216203.16.103.217203.16.103.218203.16.103.219203.16.103.220203.16.103.221203.16.103.222203.16.103.223203.16.103.224203.16.103.225203.16.103.226203.16.103.227203.16.103.228203.16.103.229203.16.103.230203.16.103.231203.16.103.232203.16.103.233203.16.103.234203.16.103.235203.16.103.236203.16.103.237203.16.103.238203.16.103.239203.16.103.240203.16.103.241203.16.103.242203.16.103.243203.16.103.244203.16.103.245203.16.103.246203.16.103.247203.16.103.248203.16.103.249203.16.103.250203.16.103.251203.16.103.252203.16.103.253203.16.103.254203.16.103.255