Home Postcodes by state NSW 2159 Postcode 2159 2159 is the postcode for 4 localities in NSW: Arcadia, Berrilee, Fiddletown and Galston. Localities with postcode 2159ArcadiaNSWBerrileeNSWFiddletownNSWGalstonNSW Postcode 2159 State or territory New South Wales (NSW) Localities 4 Council area Hornsby Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2158 · Postcode 2160