Home Postcodes by state NT 0854 Postcode 0854 0854 is the postcode for 2 localities in NT: Borroloola and King Ash Bay. Localities with postcode 0854BorroloolaNTKing Ash BayNT Postcode 0854 State or territory Northern Territory (NT) Localities 2 Council area Roper Gulf Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 0853 · Postcode 0860