Home Postcodes by state NSW 2844 Postcode 2844 2844 is the postcode for 3 localities in NSW: Birriwa, Dunedoo and Leadville. Localities with postcode 2844BirriwaNSWDunedooNSWLeadvilleNSW Postcode 2844 State or territory New South Wales (NSW) Localities 3 Council area Mid-Western; Warrumbungle Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2843 · Postcode 2845