This version has been updated with recent information. Beginning November 1, 2012, some districts might have multiple prefix codes—perhaps as many as six or seven. Similarly, there are instances where a single prefix code is used by multiple districts. In cases where the prefix code doesn't seem to match the name of the city or district, a neighboring or encompassed/encompassing locale from which the prefix was derived might help explain the origin.
Germany's system of locale-based license plate prefixes dates from 1906, modified periodically in intervening years. In general, the prefixes identify where plates are issued.
German PlateFinder will help travelers, students, and other interested parties learn and appreciate German geography and history. The app lists the codes in use today, together with the issuing city, district or government agency that corresponds to each. Selecting an entry displays a map that shows the issuer's location. In most cases, the map view includes a button that displays a related Wikipedia page.