Home Postcodes by state NSW 2318 Postcode 2318 2318 is the postcode for 7 localities in NSW: Campvale, Ferodale, Fullerton Cove, Medowie, Oyster Cove, Salt Ash and 1 more. Localities with postcode 2318CampvaleNSWFerodaleNSWFullerton CoveNSWMedowieNSWOyster CoveNSWSalt AshNSWWilliamtownNSW Postcode 2318 State or territory New South Wales (NSW) Localities 7 Council area Port Stephens Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2317 · Postcode 2319