Home Postcodes by state NSW 2017 Postcode 2017 2017 is the postcode for 2 localities in NSW: Waterloo and Zetland. Localities with postcode 2017WaterlooNSWZetlandNSW Postcode 2017 State or territory New South Wales (NSW) Localities 2 Council area Sydney Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2016 · Postcode 2018