Net::IP Already does this: Quick-N-Dirty copy of a Oneliner I got aliased: 
use Net::IP;
$i=new Net::IP("$ARGV[0]-$ARGV[1]");
@l=$i->find_prefixes();
foreach(@l){ 
    ($i,$m)=split("/"); 
    $i=new Net::IP($i); 
    print$i->short()."/$m\n";
}

[download]
Pass it: 192.168.1.0 192.168.2.130
Output: 
192.168.1.0/24
192.168.2.0/25
192.168.2.128/31
192.168.2.130/32

[download]
Yes it requires a 'bit' of coding, and IMO would be better suited to go into Net::IP instead of a new module.

BIG HUGE DISCLAIMER (for Dio): THIS CODE SUCKS AND PROBABLY WILL BREAK

In reply to Re^3: RFC: CPAN module Net::IP::Correct by OverlordQ
in thread RFC: CPAN module Net::IP::Correct by arc_of_descent

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