Home Postcodes by state WA 6148 Postcode 6148 6148 is the postcode for 4 localities in WA: Ferndale, Riverton, Rossmoyne and Shelley. Localities with postcode 6148FerndaleWARivertonWARossmoyneWAShelleyWA Postcode 6148 State or territory Western Australia (WA) Localities 4 Council area Canning Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6147 · Postcode 6149