The ISO 3166-1 alpha-2 code is also exceptionally reserved for the United Kingdom on the request of the country.

The first part is , the ISO 3166-1 alpha-2 code of Mexico.

Usage of ISO 3166-1 alpha-2 codes was recommended to be used starting in 1994, but they have not become widely used.

Bermuda is officially assigned the ISO 3166-1 alpha-2 code .

Vatican City is officially assigned the ISO 3166-1 alpha-2 code .

Christmas Island is officially assigned the ISO 3166-1 alpha-2 code .

The ISO 3166-1 alpha-2 codes are used in different environments and are also part of other standards.

The ISO 3166-1 alpha-2 codes are used in the following standards:

The following is a colour-coded decoding table of all ISO 3166-1 alpha-2 codes.

Macau, a special administrative region of China, is officially assigned the ISO 3166-1 alpha-2 code .