Home Postcodes by state NSW 2158 Postcode 2158 2158 is the postcode for 3 localities in NSW: Dural, Middle Dural and Round Corner. Localities with postcode 2158DuralNSWMiddle DuralNSWRound CornerNSW Postcode 2158 State or territory New South Wales (NSW) Localities 3 Council area Mainly Hornsby, partly The Hills; Mainly The Hills, partly Hornsby Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2157 · Postcode 2159