This is Net::Netmask packaged for Debian GNU systems.

Upstream source: http://www.cpan.org/modules/by-module/Net/

Upstream Author: David Muir Sharnoff <muir@idiom.com>.

Copyright and license:

Copyright (C) 1998-2003 David Muir Sharnoff.  License hereby
granted for anyone to use, modify or redistribute this module at 
their own risk.  Please feed useful changes back to muir@idiom.com.
