http://www.subnet-calculator.com/wildcard.php
Wildcard Mask Calculator
Wildcard Mask Calculator
The ACL Wildcard Mask Calculator enables wildcard mask calculations using IP address and wildcard mask.
Results of the wildcard mask calculation provide the first IP address and last IP address in the wildcard mask network range.
For CIDR supernetting, please use the CIDR Calculator. For classful supernetting, please use the IP Supernet Calculator. For classful subnetting, please use the IP Subnet Calculator.