Install latest/stable of CIDR Network Calculator
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A simple CIDR Network Calculator to help you calculate IPv4 subnet masks. CIDR stands for "Classless Inter-Domain Routing", and represents the preferred method of carving up IPV4 networks for the last 15 years.
This calculator was built from the ground up for trial and error and "what if" usage. It was made assuming you have a "history" command so you can recall the preceding command with the uparrow key and modify the preceding command as needed. So start with the bottom-most IP address you want to cover, and keep adjusting the maskbits figure (the number after the slash), until you cover all the IP addresses you want.
To use this calculator to find a small IP address group containing addresses between 192.168.47.21 and 192.168.47.67, issue the following command:
cidr-calc 192.168.47.21/24
This calculator was deliberately made to be easily used with trial and error, so you can get the range you want to get.
Copyright © 2018 Steve Litt. Released under the Expat License: https://directory.fsf.org/wiki/License:Expat
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