Most products in the U.S. use a 12-digit UPC barcode. Each section tells you something different. 1. First digit — Number system / country code • The first number identifies the number system used. • In many cases, it reflects where the barcode was registered, not where the product was made. • Example: Numbers starting with 0 or 1 are commonly registered in the United States. 2. Next five digits — Manufacturer code • These numbers identify the company that registered the product. • Larger compan