Home Postcodes by state NSW 2023 Postcode 2023 2023 is the postcode for Bellevue Hill, NSW. Localities with postcode 2023Bellevue HillNSW Postcode 2023 State or territory New South Wales (NSW) Localities 1 Council area Woollahra Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2022 · Postcode 2024