Lists of country codes
This is a listing of lists of country codes:

List of ISO country codes (ISO 3166)
ITU country code (International Telecommunication Union)
List of country calling codes E.164
Mobile country code E.212
Maritime identification digits
List of ITU letter codes (radiocommunication division)
UIC country code (International Union of Railways)
List of GS1 country codes
List of NATO country codes
List of IOC country codes (International Olympic Committee)
List of FIFA country codes (International Federation of Association Football)
List of FIPS country codes
List of vehicle registration codes