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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
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closed as not constructive by Chris S Feb 13 '13 at 15:39

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

    
Not sure about the /32 in your example. See tools.ietf.org/rfc/rfc4632.txt and "Host route". As I read it /32 and /31 are special cases. –  Hennes Feb 13 '13 at 13:19
    
Shopping Questions are Off-Topic on any of the Stack Exchange sites. See Q&A is hard, lets go Shopping and the FAQ for more details. –  Chris S Feb 13 '13 at 15:39
    
This isn't a shopping question... –  dunxd Feb 13 '13 at 16:57
    
@dunxd As it is written ("give me a tool that does X") it's a shopping question - Google is the answer, just ask for subnet calculator. If rewritten to "How do I calculate the optimal subnet mask for X?" the answer would be covered by the canonical IPv4 Subnetting question –  voretaq7 Feb 13 '13 at 18:06
    
You mean if rewritten in almost exactly the same way as they phrased the question? I still disagree that this is a shopping question. It isn't asking for product recommendations - it is asking for the right tool to use. Fair enough that this is a dupe, but just closing the question like this chases new users off. –  dunxd Feb 14 '13 at 9:44

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