Home Postcodes by state WA 6623 Postcode 6623 6623 is the postcode for 6 localities in WA: Bowgada, Bunjil, Gutha, Koolanooka, Morawa and Pintharuka. Localities with postcode 6623BowgadaWABunjilWAGuthaWAKoolanookaWAMorawaWAPintharukaWA Postcode 6623 State or territory Western Australia (WA) Localities 6 Council area Perenjori; Morawa Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6620 · Postcode 6625