Vehicle registration plates of Ecuador have three letters and three or four numbers ranging from 000 to 9999, for serial formats of ABC-123 and ABC-1234.
The first letter indicates the province of issue. The second letter, also called the "key letter", identifies the type of license plate.
The background color of the license plate varies according to the key letter and identifies the type of service of the vehicle.
The rest of letters are for private, or particular, vehicles. Their background color is white-silver.