Home Postcodes by state TAS 7186 Postcode 7186 7186 is the postcode for 2 localities in TAS: Saltwater River and Sloping Main. Localities with postcode 7186Saltwater RiverTASSloping MainTAS Postcode 7186 State or territory Tasmania (TAS) Localities 2 Council area Tasman Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 7185 · Postcode 7187