Can I extract my Code number whilst the radio is still working?

Nick G asked;

Can I extract my Code number whilst the radio is still working?

A fair question, but if you think about it, what use would a security code be if a car thief could also access it before removing the stereo from your car, simply by pressing a few buttons?

The only way that your security code number can be determined if you have lost it, is by using a specialist decoding company, such as ourselves.

-Dave Watts