Country Code - ISO 3166-1

ISO 3166-1

This standard defines for most of the countries and dependent areas in the world:

• a two-letter (ISO 3166-1 alpha-2)
• a three-letter (ISO 3166-1 alpha-3), and
• a three-digit numeric (ISO 3166-1 numeric) code.

The two-letter codes are used as the basis for some other codes or applications, for example,

• for ISO 4217 currency codes and
• with deviations, for country code top-level domain names (ccTLDs) on the Internet: list of Internet TLDs.

For more applications see ISO 3166-1 alpha-2.