HR is the international licence plate code for which country?
ISO 3166-2:HR ISO 3166-2:HR ISO 3166-2:HR is the entry for Croatia in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. Currently for Croatia, ISO 3166-2 codes are defined for 1 city and 20 counties. The city Zagreb is the capital of the country and has special status equal to the counties. Each code consists of two parts, separated by a hyphen. The first part is , the ISO 3166-1 alpha-2 code of Croatia.
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.