Subnet Calc

Free - by Swipe Stack Ltd

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Versions

Initial release Nov 24, 2008
Current version (2.2.1) Mar 22, 2012

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Average rating for all versions

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718 ratings 3.5 *****
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Updated on May 18, 2012

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Description

Subnet Calc is a tool designed to help network administrators who need to remember details about the various subnets which they administer. You can select an IP and a subnet in CIDR notation and Subnet Calc will tell you all the details about the subnet, including it's class and even whether or not the IP is in the loopback / private ranges.