Home Postcodes by state WA 6488 Postcode 6488 6488 is the postcode for 3 localities in WA: North Trayning, South Trayning and Trayning. Localities with postcode 6488North TrayningWASouth TrayningWATrayningWA Postcode 6488 State or territory Western Australia (WA) Localities 3 Council area Trayning Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6487 · Postcode 6489