But isn't splitting an IP range into its constituent valid IP blocks actually maximising the number of routing entries? (assuming this exercise is for a route table).

I was actually thinking in terms of minimal and usable. Your initial example included the range 192.168.1.0 - 192.168.1.5. That range cannot be expressed as a single entity using CIDR or network masks, as you allude to, so it can't be used as a routing entry.

One approach I frequently see is this: 

192.168.0.0 255.255.255.0
192.168.1.0 255.255.255.0
192.168.2.0 255.255.255.0
192.168.3.0 255.255.255.0
192.168.4.0 255.255.255.0
192.168.5.0 255.255.255.0

With your proposed module, I was imagining that same range could be programmatically rewritten as this: 

192.168.0.0 255.255.252.0  ( /22 )
192.168.4.0 255.255.254.0  ( /23 )

In these scenarios, I see this as a way of reducing the number of entries in a routing table.

Module implementation aside, I'm now confused as how to go ahead with CPAN. I did send a request to register a namespace using PAUSE, but I was informed by various good folks that its not a needed step. Do I need a certain number of votes here on Perlmonks to get the go ahead?

A monk vote shouldn't be needed. I think you were on the right track with PAUSE, as described here.

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

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