AS4643 203.16.81.0/24 CIDR and IP Range Summary.ASN: 4643 - Optus Customer NetworkHost Count: 254Addressable IPs: 256 203.16.81.0203.16.81.1203.16.81.2203.16.81.3203.16.81.4203.16.81.5203.16.81.6203.16.81.7203.16.81.8203.16.81.9203.16.81.10203.16.81.11203.16.81.12203.16.81.13203.16.81.14203.16.81.15203.16.81.16203.16.81.17203.16.81.18203.16.81.19203.16.81.20203.16.81.21203.16.81.22203.16.81.23203.16.81.24203.16.81.25203.16.81.26203.16.81.27203.16.81.28203.16.81.29203.16.81.30203.16.81.31203.16.81.32203.16.81.33203.16.81.34203.16.81.35203.16.81.36203.16.81.37203.16.81.38203.16.81.39203.16.81.40203.16.81.41203.16.81.42203.16.81.43203.16.81.44203.16.81.45203.16.81.46203.16.81.47203.16.81.48203.16.81.49203.16.81.50203.16.81.51203.16.81.52203.16.81.53203.16.81.54203.16.81.55203.16.81.56203.16.81.57203.16.81.58203.16.81.59203.16.81.60203.16.81.61203.16.81.62203.16.81.63203.16.81.64203.16.81.65203.16.81.66203.16.81.67203.16.81.68203.16.81.69203.16.81.70203.16.81.71203.16.81.72203.16.81.73203.16.81.74203.16.81.75203.16.81.76203.16.81.77203.16.81.78203.16.81.79203.16.81.80203.16.81.81203.16.81.82203.16.81.83203.16.81.84203.16.81.85203.16.81.86203.16.81.87203.16.81.88203.16.81.89203.16.81.90203.16.81.91203.16.81.92203.16.81.93203.16.81.94203.16.81.95203.16.81.96203.16.81.97203.16.81.98203.16.81.99203.16.81.100203.16.81.101203.16.81.102203.16.81.103203.16.81.104203.16.81.105203.16.81.106203.16.81.107203.16.81.108203.16.81.109203.16.81.110203.16.81.111203.16.81.112203.16.81.113203.16.81.114203.16.81.115203.16.81.116203.16.81.117203.16.81.118203.16.81.119203.16.81.120203.16.81.121203.16.81.122203.16.81.123203.16.81.124203.16.81.125203.16.81.126203.16.81.127203.16.81.128203.16.81.129203.16.81.130203.16.81.131203.16.81.132203.16.81.133203.16.81.134203.16.81.135203.16.81.136203.16.81.137203.16.81.138203.16.81.139203.16.81.140203.16.81.141203.16.81.142203.16.81.143203.16.81.144203.16.81.145203.16.81.146203.16.81.147203.16.81.148203.16.81.149203.16.81.150203.16.81.151203.16.81.152203.16.81.153203.16.81.154203.16.81.155203.16.81.156203.16.81.157203.16.81.158203.16.81.159203.16.81.160203.16.81.161203.16.81.162203.16.81.163203.16.81.164203.16.81.165203.16.81.166203.16.81.167203.16.81.168203.16.81.169203.16.81.170203.16.81.171203.16.81.172203.16.81.173203.16.81.174203.16.81.175203.16.81.176203.16.81.177203.16.81.178203.16.81.179203.16.81.180203.16.81.181203.16.81.182203.16.81.183203.16.81.184203.16.81.185203.16.81.186203.16.81.187203.16.81.188203.16.81.189203.16.81.190203.16.81.191203.16.81.192203.16.81.193203.16.81.194203.16.81.195203.16.81.196203.16.81.197203.16.81.198203.16.81.199203.16.81.200203.16.81.201203.16.81.202203.16.81.203203.16.81.204203.16.81.205203.16.81.206203.16.81.207203.16.81.208203.16.81.209203.16.81.210203.16.81.211203.16.81.212203.16.81.213203.16.81.214203.16.81.215203.16.81.216203.16.81.217203.16.81.218203.16.81.219203.16.81.220203.16.81.221203.16.81.222203.16.81.223203.16.81.224203.16.81.225203.16.81.226203.16.81.227203.16.81.228203.16.81.229203.16.81.230203.16.81.231203.16.81.232203.16.81.233203.16.81.234203.16.81.235203.16.81.236203.16.81.237203.16.81.238203.16.81.239203.16.81.240203.16.81.241203.16.81.242203.16.81.243203.16.81.244203.16.81.245203.16.81.246203.16.81.247203.16.81.248203.16.81.249203.16.81.250203.16.81.251203.16.81.252203.16.81.253203.16.81.254203.16.81.255