Home Postcodes by state SA 5245 Postcode 5245 5245 is the postcode for 3 localities in SA: Hahndorf, Paechtown and Verdun. Localities with postcode 5245HahndorfSAPaechtownSAVerdunSA Postcode 5245 State or territory South Australia (SA) Localities 3 Council area Mount Barker; Mainly Adelaide Hills, partly Mount Barker Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5244 · Postcode 5250