Home Postcodes by state SA 5250 Postcode 5250 5250 is the postcode for 3 localities in SA: Blakiston, Littlehampton and Totness. Localities with postcode 5250BlakistonSALittlehamptonSATotnessSA Postcode 5250 State or territory South Australia (SA) Localities 3 Council area Mount Barker Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5245 · Postcode 5251