This is the subnetter project. I originally developed the idea after seeing a similar application for the Palm Pilot. Not wanting to pay the shareware fee, I decided to write it myself. I also wanted to get a little experience in with Perl/Tk, so I decided to use that as the source platform. You need Perl 5.003 or higher, and these Perl modules: Socket Tk Tk::Dialog if you don't have them, CPAN does. The script is fairly straightforward. If you can think of a better or more efficient way to implement some part of it, please let me know. Thanks. Jan L. Peterson