Home Postcodes by state NT 0841 Postcode 0841 0841 is the postcode for Darwin River, NT. Localities with postcode 0841Darwin RiverNT Postcode 0841 State or territory Northern Territory (NT) Localities 1 Council area Litchfield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 0840 · Postcode 0845