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. With the opening of commercial operations on September 28, 2006, Suvarnabhumi Airport serves as the main airport replacing Don Mueang International Airport, which was unable to accommodate the overwhelming air traffic growth. At an initial stage, Suvarnabhumi Airport has a capacity to accommodate up to 45 million passengers and 3 million tons of cargo per year. Within a single hour, the airport can operate up to 76 Flights.