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I thought I saw a tool like this once upon a time, but can't find it anymore...

Anyone know a tool that would take a free range of IP addresses (as in start / end) and calculate a set of submasks that match the given range exactly?

I'm specifically looking for a tool that does not comply to class subnetting. So, for example, given an IP range like:

10.0.1.255 - 10.0.2.255

The tool should be able to return with two masks to match the exact range:

10.0.1.255/32
10.0.2.0/24
PersianGulf
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Salieri
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1 Answers1

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This web tool works: http://www.ipaddresslocation.org/subnet-mask-calculator.php

See also http://www.subnet-calculator.com/

Alastair Irvine
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