IP Subnet Mask Quick Cheat Sheet

So I get asked on a regular basis how many addresses can i get from a /24 subnet or what does mean.

Let me break it down for you real quick like:

When you use as your subnet you are limiting yourself to a network containing all the same ip’s except for the last number. Like where the 0 changes. And using Would limit you to the last two digits changing like . Are you with me? It gets a little more complex with different subnets but here is a quick breakdown for you:

Check out this IP Subnet Tool Calculator – MINT! http://www.syrex.co.za/ipcalc/


  1. Anonymous

    This IP/Cidr utility page has a better calculator.

    Good tutorial ….. thanks.


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