Home Postcodes by state NSW 2151 Postcode 2151 2151 is the postcode for 2 localities in NSW: North Parramatta and North Rocks. Localities with postcode 2151North ParramattaNSWNorth RocksNSW Postcode 2151 State or territory New South Wales (NSW) Localities 2 Council area Parramatta Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2150 · Postcode 2152