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Old 08-15-2014, 08:35 AM   #1
battles
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Calculating an IP range


Can someone tell me how to calculate an IP range. I may not be using the correct terminology, but what I mean is how to calculate something like 221.208.0.0 - 221.212.255.255 to 221.208.0.0/13.

Thanks.
 
Old 08-15-2014, 09:46 AM   #2
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Something like this?

http://ip2cidr.com/
 
Old 08-15-2014, 10:12 AM   #3
battles
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Thanks, but I actually need to know how to programmatically do the conversion.
 
Old 08-15-2014, 10:37 AM   #4
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If you want to figure it out on paper,. here are a few methods to do so:

http://www.dslreports.com/faq/cisco/...ing_techniques

Once you understand what they are and how to implement them, it shouldn't be too difficult to make your own calculator.
 
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Old 08-15-2014, 10:43 AM   #5
battles
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Thanks, that is what I need. I am a programmer and need to incorporate this kind of routine in a script.
 
Old 08-20-2014, 08:45 AM   #6
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http://search.cpan.org/~mrsam/Net-CIDR-0.11/CIDR.pm

heres perl solution.
 
Old 08-20-2014, 08:50 AM   #7
battles
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That is nice, exactly what I needed. I'll have to see how to set perl up, but that shouldn't be too much of a problem.
Thanks.
 
  


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