Home Postcodes by state SA 5434 Postcode 5434 5434 is the postcode for 3 localities in SA: Barndioota, Hawker and Kanyaka. Localities with postcode 5434BarndiootaSAHawkerSAKanyakaSA Postcode 5434 State or territory South Australia (SA) Localities 3 Council area Flinders Ranges Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5433 · Postcode 5440