High Quality Content by WIKIPEDIA articles! Serbian car license plate codes consist of a two-letter region code, followed by two 2- or 3-digit numbers, separated by a hyphen (e.g. BG 123-456).Vehicles operated by foreign embassies, consulates, consular and diplomatic staff, and various international organizations have been given plates with a distinguishing format of two (or three) numbers, one letter, three numbers. 12(3)-L-456 Characters are yellow on a black background. The first group of three numbers (123) identifies the country or organization to which the plate has been issued, the second group of three numbers (456) is a serial number. The letter in the middle (L) is denoting the status of the owner.