Home Postcodes by state WA 6440 Postcode 6440 6440 is the postcode for 6 localities in WA: Bandya, Beadell, Cosmo Newbery, Lake Wells, Laverton and Neale. Localities with postcode 6440BandyaWABeadellWACosmo NewberyWALake WellsWALavertonWANealeWA Postcode 6440 State or territory Western Australia (WA) Localities 6 Council area Laverton Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6438 · Postcode 6442