IPcalc 1.02 IPcalc is an IP address calculator. subnets, netmasks, etc Network professionals often configure IP addresses for various equipment. While the individual calculations are fairly simple - mostly bit masks - it’s easy to make mistakes. The consequences of mistakes can be disastrous; machines won’t connect with others, or worse, could isolate a whole section of the ‘net (as a misconfigured router might do). Even when calculating the IDs and masks correctly, it’s tedious. To the rescue! IPcalc now calculates all those ugly little numbers - quickly and accurately.