There are many online tools available to look up Universal Product Codes including UPC-Lookup.com and UPCDatabase.com. Electronic UPC scanners are also available for purchase at stores such as Target and Wal-Mart.
Many countries use UPC numbers to track items in stores and scan them at cash registers, including the United States, Australia and the United Kingdom. Standard UPC-A numbers consist of 12 digits, but there are many variations of UPC coding. Some products that use variations include health-related products, magazines or periodicals, and books. A European Article Number is a subset of the UPC code and has 13 digits rather than 12.