Home Postcodes by state SA 5671 Postcode 5671 5671 is the postcode for 8 localities in SA: Baird Bay, Calca, Colley, Mortana, Mount Cooper, Port Kenny and 2 more. Localities with postcode 5671Baird BaySACalcaSAColleySAMortanaSAMount CooperSAPort KennySATyringaSAWiteraSA Postcode 5671 State or territory South Australia (SA) Localities 8 Council area Streaky Bay; Elliston Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5670 · Postcode 5680