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c:\@Work\Perl\monks>perl -wMstrict -le "use Test::More 'no_plan'; ... 1..12 ok 13 - no warnings 1..13
c:\@Work\Perl\monks>perl -wMstrict -le "use Regexp::Common qw(net); ... if '99999.1.2.9999' =~ m{ ($RE{net}{IPv4}) }xms; " matches IP of '99.1.2.99'