Home Postcodes by state WA 6521 Postcode 6521 6521 is the postcode for 5 localities in WA: Badgingarra, Boothendarra, Grey, Hill River and Nambung. Localities with postcode 6521BadgingarraWABoothendarraWAGreyWAHill RiverWANambungWA Postcode 6521 State or territory Western Australia (WA) Localities 5 Council area Dandaragan Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6519 · Postcode 6522