Home Postcodes by state SA 5502 Postcode 5502 5502 is the postcode for 6 localities in SA: Fischer, Grace Plains, Korunye, Mallala, Redbanks and Reeves Plains. Localities with postcode 5502FischerSAGrace PlainsSAKorunyeSAMallalaSARedbanksSAReeves PlainsSA Postcode 5502 State or territory South Australia (SA) Localities 6 Council area Adelaide Plains; Mainly Adelaide Plains, partly Light Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5501 · Postcode 5510