Home Postcodes by state WA 6170 Postcode 6170 6170 is the postcode for 2 localities in WA: Leda and Wellard. Localities with postcode 6170LedaWAWellardWA Postcode 6170 State or territory Western Australia (WA) Localities 2 Council area Kwinana Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6169 · Postcode 6171