The city has the postal code 3000 00 -  3019 00 . 3,423/km 2  (8,870/sq mi) is the density of residents in  the urban region of Hanoi . The lowest elevation of Hanoi is 1 m  . The land area of the city is 16.0 sq mi (41.4 sq km) . The metro region is Area: 2,493.86 km2 (962.88 sq mi) in area . 595,061 is the population of Hanoi . The density of  residents in  the metro region of Hanoi is 1,275/km 2  (3,300/sq mi) . The density of  people in Hanoi is 3,200/km 2  (8,200/sq mi) . Hanoi is at an elevation of 4 m . 1,770 sq mi (4,600 km 2 ) is the area of the urban region of Hanoi . The province of the city Hanoi is East Java .  The city area code is +226 . The highest elevation of Hanoi is 5,364 m (17,598 ft) . The city Hanoi demonym is Istanbulite  . Hanoi is located in Zambia . Hanoi is named for Henry E. Huntington . Hanoi is the government of Municipality of Quito
There are less than 3269 people per sq mi in the metro region of Hanoi