Postal codes in Bangladesh are assigned to all areas in the country. And there is only five General Post Offices in Bangladesh, They are: Central General Post office, Dhaka GPO[1] assigned Code is 1000, Metropolitan General Post office, Metropolitan Dhaka[2] assigned code is 1100, Eastern General Post officeChattogram GPO[3] assigned Code 4000, Northern General Post office, Rajshahi GPO[4] assigned Code 6000 and Southern General Post office, Khulna GPO[5] assigned Code is 9000.
The post code system was introduced in Bangladesh on 22 December 1986.[6]
^Khan, Ishtiaque Ahmed (1996). The meter franking cancellations of Bangladesh. Dhaka: Bangladesh Institute of Philatelic Studies. p. 43. ISBN984-570-000-4.