Its not clear exactly what you're looking for. Is there some specification for the codes you need? If you just want to generate a batch of unique random id codes you can do something like this:

# use hash keys to hold unique id codes
my %id_codes;

# number of codes to generate
my $batch_qty = 100;

# length of id code
my $length = 24;

while (scalar keys(%id_codes) < $batch_qty){
    my $id;
    for (1..$length){
        $id .= ('A'..'Z', 'a'..'z', '0'..'9')[rand(62)];
    }
    $id_codes{$id} = 1;
}
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If you don't want to keep track of all the id codes generated, you should probably look at some form of public & private key encryption.