Home Postcodes by state WA 6442 Postcode 6442 6442 is the postcode for 2 localities in WA: Kambalda East and Kambalda West. Localities with postcode 6442Kambalda EastWAKambalda WestWA Postcode 6442 State or territory Western Australia (WA) Localities 2 Council area Coolgardie Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6440 · Postcode 6443