SolarWinds Advanced Subnet Calculator offers forward and reverse DNS resolution, response time, address translation (hexadecimal and binary) as well as address class information.
It includes a Classful Subnet Creator that calculates subnets based on subnet mask, mask bits, host bits, number of subnets and hosts per subnet and can generate a range of subnets based on these settings. Also included comes a CIDR Calculator with full support for Classless Inter-Domain Routing (CIDR). The results can be exported and printed.
SolarWinds Advanced Subnet Calculator, Freeware, Software, Download