my $string = "293F:2945";

my ( $low, $high ) = unpack( 'nn', pack( 'H4H4', unpack( 'A4xA4', $string ) ) );
print "$_  " for unpack( '(H4)*', pack( 'n*', $low .. $high ) );

##</code><code>##

293f  2940  2941  2942  2943  2944  2945

##</code><code>##

sub enum_hex_range_from_string {
    my ( $low, $high ) 
        = unpack( 'nn', pack( 'H4H4', unpack( 'A4xA4', $string ) ) );
    return unpack( '(H4)*', pack( 'n*', $low .. $high ) );
}