There is no one single postal code for the city of Beirut. Beirut is divided into 12 quarters, which are in turn subdivided into sectors. Some of these sectors have postal codes, while others do not have any official codes.
Official postal codes in Beirut are usually composed of four numbers only. In some cases, even street numbers defined by the state are ignored in favor of local, historical and commercial descriptions for locations. With knowledge of the name of the sector in Beirut, it is possible to check the postal code on websites such as mapanet.eu, geopostcodes.com or postal-codes.net.