Maybe this question is very easy for some people. I know very basic of networking and I am trying to learn more. I have followed tutorials on Microsoft and I read this:

Using a subnet mask of, your network then becomes the four networks,, and These four networks would have as valid host addresses:

But when I used online subnet calculator here I got available host adderss range of: -

I appreciate if anyone can explain how can I access

by subnet mask of, on network or explain if I am doing something wrong. Thanks in advance.

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  • Please review the answer About "Calculating Subnets" here, which is quite relevant to your question Commented Oct 14, 2014 at 12:28

2 Answers 2


As you said, you have four different networks:

You need to put each of those as a separate network into your calculator. Your calculator will only work on one network at a time, and you have four networks.

If you enter as the network with a mask of, you should get - as host address range.

  • I got your idea but I think with 128 I get - Commented Oct 14, 2014 at 15:22
  • Correct. I had a misstatement there. I was looking at the 192 on the mask when I was typing the hosts. I fixed it.
    – Ron Maupin
    Commented Oct 14, 2014 at 15:49

With the four defined networks that you want to use: (/26 =

You apply these four networks onto router interfaces. Suppose you use the first address as your gateway address, your router interfaces would be assigned these addresses:

interface FastEthernet 0/0
 description network-1
interface FastEthernet 0/1
 description network-2
interface FastEthernet 0/2
 description network-3
interface FastEthernet 0/3
 description network-4

So with a computer on network-1, that computer can have an address of with a default gateway of

A computer on network-2, can have an address with a default gateway of

So on and so forth as long as the address meets the criteria of the range of the respective subnet.

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