Home Postcodes by state WA 6572 Postcode 6572 6572 is the postcode for Piawaning, WA. Localities with postcode 6572PiawaningWA Postcode 6572 State or territory Western Australia (WA) Localities 1 Council area Victoria Plains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6571 · Postcode 6574