Home Postcodes by state WA 6430 Postcode 6430 6430 is the postcode for 14 localities in WA: Binduli, Broadwood, Hannans, Kalgoorlie, Karlkurla, Lamington and 8 more. Localities with postcode 6430BinduliWABroadwoodWAHannansWAKalgoorlieWAKarlkurlaWALamingtonWAMullingarWAPiccadillyWASomervilleWASouth KalgoorlieWAWest KalgoorlieWAWest LamingtonWAWilliamstownWAYilkariWA Postcode 6430 State or territory Western Australia (WA) Localities 14 Council area Kalgoorlie-Boulder Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6429 · Postcode 6431