International vehicle registration code system is used for vehicles belonging to the diplomats of foreign countries with license plate from the host country. That system is host country-specific and varies largely from country to country. For example TR on a diplomatic car in the USA indicates Italian, not Turkish. Such markings in Norway are indicated with numbers only, again different from international standards (e.g. 90 means Slovakian. International vehicle registration code The country in which a motor vehicle's vehicle registration plate was issued may be indicated by an international licence plate country code, formerly known as an International Registration Letter or International Circulation Mark.
Vehicle registration plates of Estonia but rather served to inform that the vehicle had been registered in the Estonian SSR. There were plans to introduce an additional ЕС suffix, but as this occurred just before the collapse of the Soviet Union, the mark was subsequently allocated to the Russian city of St. Petersburg. Vehicle registration plates of Estonia Vehicle registration plates of Estonia are divided into 18 categories, the most common of these (A1) is composed of three numbers and three letters (e.g. 123 ABC). Most registration plate types have black letters on a white background, and the plates are the same size and length