Number plates
A vehicle registration plate is a metal or plastic plate attached to a motor vehicle or trailer for official identification purposes. The registration identifier is a numeric or alphanumeric code that uniquely identifies the vehicle within the issuing region's database.
In many countries, the identifier is unique within the entire country, with a prefix indicating the state or province.
Whether the identifier is associated with a vehicle or a person also varies by issuing agency. Depending on the country, the vehicle registration plate may be called a registration plate (in British English), a license plate (in American English), a number plate, or a tag.