https://calculla.com/country_three_letters_codes
The ISO 3166 standard defines codes that allow for unambiguous identification of countries, and in the case of ISO 3166-2 also smaller administrative units.; The ISO 3166-1 codes have three alternative versions that can be used as needed:. alpha-2 - a two-letter code e.g. US means United States of America,; alpha-3 - three letter code, in the case of United States is USA,