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The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted.
ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard [1] published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest.
The country code is in use for example for the two-letter suffixes such as .us (United States), .fr (France) or .de (Germany) in top-level domains (for countries) on the Internet.
It defines three sets of country codes: ISO 3166-1 alpha-2 – two-letter country codes which are the most widely used of the three, [citation needed] and used most prominently for the Internet's country code top-level domains (with a few exceptions).
The ISO 3166-1-Alpha-2 code, commonly referred to as the 2-letter country code for France, is FR, while the ISO 3166-1-Alpha-3 code, known as the 3-letter country code, is FRA. Similarly, the ISO 3166-1 numeric code for France is 250.
More common for this is the 2-letter code alpha-2. It is mainly used for assigning a country-specific domain. The European IBAN system for bank account numbers also uses this code.
The country code is in use for example for the two-letter suffixes such as .us (United States), .fr (France) or .de (Germany) in top-level domains (for countries) on the Internet.