Qatar Airways, is the state-owned flag carrier of Qatar. Headquartered in the Qatar Airways Tower in Doha, the airline operates a hub-and-spoke network, linking over 150 international destinations across Africa, Central Asia, Europe, Far East, South Asia, Middle East, North America, South America and Oceania from its base at Hamad International Airport, using a fleet of more than 180 aircraft. Qatar Airways Group employs more than 40,000 people, of whom 24,000 work directly for Qatar Airways. The carrier has been a member of the Oneworld alliance since October 2013, the first Gulf carrier to sign with one of the three airline alliances. The airline has won the "World's Best Airline" awards four times, including the most recent year (2017), and has been acclaimed as among the world's best airlines.