ISO 3166-1

ISO 3166-1 as part of the ISO 3166 standard provides codes for the names of countries and dependent areas. It was first published in 1974 by the International Organization for Standardization and defines three different codes for each area:

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• ISO 3166-1 alpha-2, a two-letter system with many applications, most notably the Internet top-level domains for countries.
• ISO 3166-1 alpha-3, a three-letter system.
• ISO 3166-1 numeric, a three-digit numerical system, is identical to that defined by the United Nations Statistical Division.

A country or territory generally gets new alpha codes if its name changes, whereas a new numeric code is associated with a change of boundaries. Some codes in each series are reserved, for various reasons.

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ISO 3166-1 is not the only standard for country codes.

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The following is intended to be a complete ISO 3166-1 code list in alphabetical order by country name (encoding list). The table includes formal codes only. For reserved codes, see ISO 3166-1 alpha-2#ISO 3166-1 Alpha-2 Reserved Code Elements list and ISO 3166-1 alpha-3. ISO 3166-1 does not have numeric reserved codes.

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ISO: ISO has many meanings:...

ISO 3166: ISO 3166 is a three-part geographic coding standard for coding the names of countries and dependent areas, and the principal subdivisions thereof....

Standard: The word standard has several meanings:...