Home Postcodes by state SA 5730 Postcode 5730 5730 is the postcode for 3 localities in SA: Beltana, Blinman and Parachilna. Localities with postcode 5730BeltanaSABlinmanSAParachilnaSA Postcode 5730 State or territory South Australia (SA) Localities 3 Council area Unincorporated SA Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5725 · Postcode 5731