From their site: Welcome to the Internet UPC Database. This free service is run as a hobby of mine. This site isn't limited to UPCs any more. First of all, the term 'UPC' has been deprecated the new term is UCC-12. But the world has moved beyond that. As of January 2005, retailers in the U.S. are supposed to be able to support the EAN/UCC-13 code (the rest of the world has done this for years), which uses similar symbology, and one additional digit.