In our blog A simple guide to IPv4 addressing we offered a Free Excel IPv4 Subnet Calculator which you can get by signing up below.
Check out the video to see the spreadsheet in action to get an idea of how it works.
FREE EXCEL IPv4 SUBNET CALCULATOR
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If you’ve come this far, then you probably have a good use for the calculator. It’s my go-to tool for the job – you know you want to 🙂