How do I go about using a part number for Wagner Disc Brake Pads to find out if they are front or rear?

I need to use the part number on the disc brake pads so I can find out if they are front or rear brakes?. I also need to use the part number so I can find out what kind of vechile they will work on?. Meaning truck, car, or both?How do I go about using a part number for Wagner Disc Brake Pads to find out if they are front or rear?Try goin' to mechanic, Whenever I have car problems go there.