országkódokra

Országkódok, often referred to as country codes, are standardized abbreviations used to represent countries and their dependent territories. These codes are employed in various contexts, including international telecommunications, postal services, and data exchange. The most widely recognized system is the ISO 3166 standard, established by the International Organization for Standardization.

ISO 3166 is divided into three parts. ISO 3166-1 defines the codes themselves, providing three types of designations: ISO 3166-1 alpha-2, which consists of two-letter codes (e.g., US for the United States, DE for Germany), ISO 3166-1 alpha-3, which uses three-letter codes (e.g., USA for the United States, DEU for Germany), and ISO 3166-1 numeric, which assigns three-digit numeric codes (e.g., 840 for the United States, 276 for Germany).

Beyond ISO 3166, other coding systems exist. For example, in internet domain names, two-letter country code top-level domains (ccTLDs) are used, such as .uk for the United Kingdom or .fr for France, which largely align with the ISO 3166-1 alpha-2 codes. In international dialing, telephone country codes, also known as area codes, are used to establish connections to specific countries, such as +1 for North America or +44 for the United Kingdom. These various country codes facilitate clear and unambiguous identification of countries across different international applications.