Learning how to calculate a subnet


New Member
How do I create 4 subnets from the default network (I need to use the entire block)? I'm honestly not good at math and this looks very confusing to me. Is there anyone who could just explain this to me step by step? Thanx.


Active Member
I'm not sure I would say /16 is a "default" :) Usually /24 is the most common.

Here is a link to a CIDR calaculator

A /16 is the same thing as a This will give you over 65,000 subnets.

This closest number that can be divided by 4 is 64. 64 divided by 4 = 16.
So you need 16,000 (16,384) hosts per subnet?

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