You don't pass '437 A A437', you pass the result of pack('N A1 A*', '437', 'A', 'A437'). 
use Data::Dumper qw( Dumper );

for (qw[ A066 A067 A098 A099 ]) {
   my $coded = pack('N A1 A*', substr($_, 1), substr($_, 0, 1),  $_);
   local $Data::Dumper::Useqq = 1;
   local $Data::Dumper::Terse = 1;
   print("$_: ", Dumper($coded));
}

[download]
A066: "\0\0\0BAA066"
A067: "\0\0\0CAA067"
A098: "\0\0\0bAA098"
A099: "\0\0\0cAA099"

[download]

PS - Why do you keep replying to your node?

In reply to Re^2: Sorting (GRT) and locale issues by ikegami
in thread Sorting (GRT) and locale issues by chrism01

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