Home Postcodes by state WA 6363 Postcode 6363 6363 is the postcode for 2 localities in WA: Dudinin and Walyurin. Localities with postcode 6363DudininWAWalyurinWA Postcode 6363 State or territory Western Australia (WA) Localities 2 Council area Kulin Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6361 · Postcode 6365