(+213) 021 is the area code of UNESCO World Heritage Site . 35°52′N 128°36′E﻿ / ﻿35.867°N 128.600°E are the coordinates of the city. . The area of the urban region is 9,014.3 sq mi (3,843.8 sq km) . The lowest elevation of UNESCO World Heritage Site is 2,838 ft . UNESCO World Heritage Site is at an elevation of 381 m . UNESCO World Heritage Site is located in People's Republic of China . The city was incorporated in 1900 . The mayor of UNESCO World Heritage Site is Zhang Guoqing . The province of the city UNESCO World Heritage Site is Razavi Khorasan . The city land area is 225.73 sq km  (87.15 sq mi) . The postal code of the city is 090101 to 090158 . The highest elevation of UNESCO World Heritage Site is 424 m (1,391 ft) . 1,500/km 2  (3,900/sq mi) is the density of people in  the metro region of UNESCO World Heritage Site . Population: 2,698,077  is the population of UNESCO World Heritage Site . The city water area is 4.12 sq mi (10.67 km 2 ) . The density of  people in  the urban region of UNESCO World Heritage Site is 3,423/km 2  (8,870/sq mi)
The city UNESCO World Heritage Site is part of Razavi Khorasan province