Home Postcodes by state WA 6031 Postcode 6031 6031 is the postcode for 3 localities in WA: Banksia Grove, Carramar and Neerabup. Localities with postcode 6031Banksia GroveWACarramarWANeerabupWA Postcode 6031 State or territory Western Australia (WA) Localities 3 Council area Wanneroo Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6030 · Postcode 6032