 The city area code is +82-53 . The city province is Sichuan . The city land area is 225.73 sq km  (87.15 sq mi) . On 1799 (Guyandotte) the city was incorporated . The area of the urban region is 335.4 sq mi (539.7 km 2 ) . 2,200/km 2  (5,700/sq mi) is the density of residents in  the metro region of Derby . The postal code of the city is 9XXXXXX . The mayor of Derby is Kakha Kaladze . The Derby city highest elevation is 91 m (299 ft) . The coordinates of the city are 8°3′S 34°54′W﻿ / ﻿8.050°S 34.900°W . 68.17 sq mi (176.56 sq km) is the area of the city namedDerby . Derby is located in Magelang, Central Java . The density of  residents in Derby is 850/km 2  (2,200/sq mi) . This city is named after Rao Jodha . The Derby citys' lowest elevation is 620 ft . The demonym of the city Derby is Santiaguinos  (- as ) . Derby is at an elevation of 20 ft . 7,500/km 2  (19,000/sq mi) is the density of inhabitents in  the urban region of Derby . The water area of the city is 0.37 sq mi (0.95 km 2 )
422 sq km area of the city Derby is land