Which city's international airport is identified by the International Air Transport Association (IATA) code 'DXB'?

Dubai International Airport (IATA code is DXB) is the primary international airport serving Dubai, United Arab Emirates and is the world's busiest airport by international passenger traffic. It is also the third-busiest airport in the world by passenger traffic, the sixth-busiest cargo airport in world, the busiest airport for Airbus A380 and Boeing 777 movements, and the busiest airport in the world operating with only two runways. In 2017, DXB handled 88 million passengers, 2.65 million tonnes of cargo and registered 409,493 aircraft movements.

The airport is operated by the Dubai Airports Company and is the home base of Dubai's international airlines, Emirates and flydubai. The Emirates hub is the largest airline hub in the Middle East; Emirates handles 51% of all passenger traffic and accounts for approximately 42% of all aircraft movements at the airport. Dubai Airport is also the base for low-cost carrier flydubai which handles 13% of passenger traffic and 25% of aircraft movements at DXB. The airport has a total capacity of 90 million passengers annually. As of January 2016, there are over 7,700 weekly flights operated by 140 airlines to over 270 destinations across all inhabited continents.