Home Postcodes by state WA 6429 Postcode 6429 6429 is the postcode for 8 localities in WA: Boorabbin, Bullabulling, Coolgardie, Karramindie, Londonderry, Mount Burges and 2 more. Localities with postcode 6429BoorabbinWABullabullingWACoolgardieWAKarramindieWALondonderryWAMount BurgesWAVictoria RockWAWallarooWA Postcode 6429 State or territory Western Australia (WA) Localities 8 Council area Coolgardie Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6428 · Postcode 6430