Pasay City covers an aggregate area territory of 18.64 square kilometers (7.20 sq mi), making it the third littlest political subdivision in the National Capital Region and fourth in the entire nation. It fringes City of Manila toward the north, Parañaque toward the south, Makati and Taguig toward the upper east, and Manila Bay toward the west. The city can be isolated in 3 unmistakable zones: the city's urban range with a territory of 5.505 square kilometers (2.125 sq mi); the Civil Aeronautics Administration (CAA) complex, which incorporate the Ninoy Aquino International Airport (NAIA) and the Villamor Airbase, with a region of 9.5 square kilometers (3.7 sq mi); and the recovered area from Manila Bay with a region of 4.00 square kilometers (1.54 sq mi). Philippine Airlines is headquartered in the Philippine National Bank Financial Center next to the World Trade Center Manila in Pasay City. Soul of Manila Airlines has its central station in Roxas Sea Front Garden in Pasay City. Buddy Express, Cebu Pacific, Air Juan, Interisland Airlines have their central station on the grounds of Ninoy Aquino International Airport and in Pasay City. Oishi (Liwayway), a nibble organization, additionally has its home office in Pasay.