Home Postcodes by state SA 5520 Postcode 5520 5520 is the postcode for 6 localities in SA: Barunga Gap, Bumbunga, Burnsfield, Gleeson Hill, Snowtown and Wokurna. Localities with postcode 5520Barunga GapSABumbungaSABurnsfieldSAGleeson HillSASnowtownSAWokurnaSA Postcode 5520 State or territory South Australia (SA) Localities 6 Council area Wakefield; Mainly Barunga West, partly Wakefield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5510 · Postcode 5521