Country codes are short form of countries represent in alphabetical and numerical format. The below list shows the Country ISO-3166 Alpha-2 (2 letter), ISO-3166 Alpha-3 (3 letter) and ISO-3166 Numeric Country Codes. Two-letter and Three-letter country codes are used to represent the countries as short name. The International Organization for Standardization (ISO) created and maintain the ISO 3166 standard codes for the representation of names of all countries.