how to find a products barcode number
1. Request a UPC or ISBN identification number for your product and/or company. This will allow all of your products to begin with the same numbers. Each additional product will differ in the last few UPC or ISBN number.1  The UPC number is available through a website called Barcode.gs1us.org.. Request a UPC or ISBN identification number for your product and/or company. This will allow all of your products to begin with the same numbers. Each additional product will differ in the last few UPC or ISBN number.