Home Postcodes by state WA 6558 Postcode 6558 6558 is the postcode for Wooroloo, WA. Localities with postcode 6558WoorolooWA Postcode 6558 State or territory Western Australia (WA) Localities 1 Council area Mundaring Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6556 · Postcode 6560