Home Postcodes by state WA 6038 Postcode 6038 6038 is the postcode for Alkimos, WA. Localities with postcode 6038AlkimosWA Postcode 6038 State or territory Western Australia (WA) Localities 1 Council area Wanneroo Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6037 · Postcode 6041