ISO 3166: Meaning (information, definition, explanation, facts)

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

• ISO 3166-1 codes for country and dependent area names, first published in 1974
  • ISO 3166-1 alpha-2 the famous two-letter country codes
  • ISO 3166-1 alpha-3 three-letter country codes
  • ISO 3166-1 numeric three-digit country codes
• ISO 3166-2 defines codes for the principal subdivisions of a country or dependent area.
  • Newsletter I-1
  • Newsletter I-2
  • Newsletter I-3
  • Newsletter I-4
  • Newsletter I-5
  • Newsletter I-6
• ISO 3166-3 defines codes for superseded ISO 3166-1 codes, first published in 1998.