Home Postcodes by state NSW 2090 Postcode 2090 2090 is the postcode for 3 localities in NSW: Cremorne, Cremorne Junction and Cremorne Point. Localities with postcode 2090CremorneNSWCremorne JunctionNSWCremorne PointNSW Postcode 2090 State or territory New South Wales (NSW) Localities 3 Council area North Sydney Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2089 · Postcode 2092