Home Postcodes by state WA 6569 Postcode 6569 6569 is the postcode for 2 localities in WA: Calingiri and Old Plains. Localities with postcode 6569CalingiriWAOld PlainsWA Postcode 6569 State or territory Western Australia (WA) Localities 2 Council area Victoria Plains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6568 · Postcode 6571