Home Postcodes by state SA 5256 Postcode 5256 5256 is the postcode for 5 localities in SA: Clayton Bay, Milang, Nurragi, Point Sturt and Tolderol. Localities with postcode 5256Clayton BaySAMilangSANurragiSAPoint SturtSATolderolSA Postcode 5256 State or territory South Australia (SA) Localities 5 Council area Alexandrina Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5255 · Postcode 5259