Greek vehicle registration plates are composed of three letters and four digits per plate (e.g. ΑΑΑ-1000). The letters represent the district (prefecture) that issues the plates while the numbers begin from 1000 to 9999. Similar plates with digits beginning from 1 to 999 are issued for motorcycles which exceed 50 cc. Combinations used for overseas residents are L-NNNN (where L = letter and N = number) and are limited. Until 2003, taxis used L-NNNN; the plate was aligned with the prefecture and the letters were colored red.