Home Postcodes by state WA 6470 Postcode 6470 6470 is the postcode for Kulja, WA. Localities with postcode 6470KuljaWA Postcode 6470 State or territory Western Australia (WA) Localities 1 Council area Koorda Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6468 · Postcode 6472