netrange->cidr script - too many replies... thank you all

I received way too many replies on this request. I really appreciate
everybody who did reply, but please no more I found what I'm looking for
in duplicates and triplicates....

For those others also interested here is what I was pointed to (sorted by
number of pointers - almost 10 for aggis and 2-5 for others):
1. aggis -
2. Net::CIDR::range2cidr(), Net::CIDR::Lite -
3. sipcalc -

Also several people have sent me their own perl scripts that that can be
adapted to do what I wanted as well (if I needed it, which does not seem
necessary given number of alternatives). Thanks you for those as well.

Nanog community is really very helpfull. Please keep it up!