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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. See the ISO 3166-3 standard for former country codes.
ISO 3166-1 alpha-3 – three-letter country codes which allow a better visual association between the codes and the country names than the alpha-2 codes. ISO 3166-1 numeric – three-digit country codes which are identical to those developed and maintained by the United Nations Statistics Division, with the advantage of script (writing system ...
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.
DNS name of the two-letter country-code top-level domain. They follow ISO 3166-1 alpha-2, with some exceptions such as ".ac" for Ascension Island, ".eu" for the European Union, or ".uk" for United Kingdom of Great Britain and Northern Ireland instead of ".gb". ISO codes bv, bl, mf, sj, gb, and um are not used for country code top-level domains.
When three-digit codes share a common leading pair, the shared prefix is marked by an arrow, (↙ ) pointing down and left to the three-digit codes. Unassigned codes are denoted by a dash (—). Countries are identified by ISO 3166-1 alpha-2 country codes; codes for non-geographic services are denoted by two asterisks (**).
ISO 3166-1 alpha-2 – two-letter country codes which are the most widely used of the three, and used most prominently for the Internet's country code top-level domains (with a few exceptions). ISO 3166-1 alpha-3 – three-letter country codes which allow a better visual association between the codes and the country names than the alpha-2 codes.
This is a comparison of the IOC, FIFA, and ISO 3166-1 three-letter codes, combined into one table for easy reference. Highlighted rows indicate those entries in which the three-letter codes differ from column to column.
ISO 3166-1 alpha-2: two-letter code; ISO 3166-1 alpha-3: three-letter code; ISO 3166-1 numeric: three-digit code; The two-letter codes are used as the basis for other codes and applications, for example, for ISO 4217 currency codes; with deviations, for country code top-level domain names (ccTLDs) on the Internet: list of Internet TLDs.