The Airports of Thailand Public Company Limited (AOT) was corporatized from a state enterprise, namely Airports Authority of Thailand (AAT), to be a public limited company on September 30, 2002 with the registered head of. ce at 333 Cherdwutagard Road, Don Muang, Bangkok 10210, Thailand. AOT is a leader of Thailand's airport business operator. Its main business lines are managing, operating and developing airports. Presently, AOT has 6 international airports under responsibility: Don Mueang, Phuket, Chiang Mai, Hat Yai, Chiang Rai and Suvarnabhumi, all of which accommodate both domestic and international hights.