Home Postcodes by state NSW 2153 Postcode 2153 2153 is the postcode for 3 localities in NSW: Baulkham Hills, Bella Vista and Winston Hills. Localities with postcode 2153Baulkham HillsNSWBella VistaNSWWinston HillsNSW Postcode 2153 State or territory New South Wales (NSW) Localities 3 Council area The Hills; Parramatta Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2152 · Postcode 2154