Home Postcodes by state SA 5304 Postcode 5304 5304 is the postcode for 3 localities in SA: Kringin, Peebinga and Pinnaroo. Localities with postcode 5304KringinSAPeebingaSAPinnarooSA Postcode 5304 State or territory South Australia (SA) Localities 3 Council area Loxton Waikerie; Southern Mallee Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5303 · Postcode 5306