Antarctica is a country.
Each airport in Antarctica has a unique three-letter IATA code used on boarding passes, baggage tags, and flight booking systems, along with a four-letter ICAO code used by air traffic controllers, pilots, and aviation authorities for flight planning, meteorological reports, and radio communications.
Airport codes are standardized identifiers assigned by the International Air Transport Association (IATA) and the International Civil Aviation Organization (ICAO). IATA codes are three letters long and are the most commonly recognized by travelers — they appear on flight tickets, booking confirmations, luggage tags, and departure boards. ICAO codes are four letters long and are used primarily in aviation operations, air traffic control, and official regulatory documents.