The
IATA airport code is a three-letter alphanumeric code designating each
airport around the world. These codes are defined by the
IATA organization of travel agents.
The codes are not quite unique: 323 of these approximately 20,000 codes are used by more than one airport.
The characters prominently displayed on baggage tags attached at airport check-in desks are an example of a way these codes are used.
While the IATA codes are the most familiar airport codes, the 4-letter ICAO airport codes[?] are also common.
A list of airports, sorted by IATA code, is available.