Tainan International Airport / Tainan Air Base

Tainan International Airport / Tainan Air Base carries the IATA code TNN — the three letters printed on boarding passes and baggage tags — and the ICAO code RCNN, used in flight plans and by air traffic control. It serves Tainan (Rende), Taiwan.

IATA codes are assigned by the International Air Transport Association for passenger-facing use; the four-letter ICAO code encodes region and country and belongs to the operational side of aviation.