Home Postcodes by state NSW 2088 Postcode 2088 2088 is the postcode for 2 localities in NSW: Mosman and Spit Junction. Localities with postcode 2088MosmanNSWSpit JunctionNSW Postcode 2088 State or territory New South Wales (NSW) Localities 2 Council area Mosman Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2087 · Postcode 2089