Home Postcodes by state WA 6425 Postcode 6425 6425 is the postcode for 2 localities in WA: Dulyalbin and Moorine Rock. Localities with postcode 6425DulyalbinWAMoorine RockWA Postcode 6425 State or territory Western Australia (WA) Localities 2 Council area Yilgarn Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6424 · Postcode 6426