Home Postcodes by state NSW 2179 Postcode 2179 2179 is the postcode for 2 localities in NSW: Austral and Leppington. Localities with postcode 2179AustralNSWLeppingtonNSW Postcode 2179 State or territory New South Wales (NSW) Localities 2 Council area Liverpool; Mainly Camden, partly Liverpool Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2178 · Postcode 2190