Home Postcodes by state WA 6536 Postcode 6536 6536 is the postcode for 3 localities in WA: Kalbarri, Kalbarri National Park and Zuytdorp. Localities with postcode 6536KalbarriWAKalbarri National ParkWAZuytdorpWA Postcode 6536 State or territory Western Australia (WA) Localities 3 Council area Northampton Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6535 · Postcode 6537