Home Postcodes by state WA 6370 Postcode 6370 6370 is the postcode for 5 localities in WA: East Wickepin, Kirk Rock, Malyalling, Wickepin and Wogolin. Localities with postcode 6370East WickepinWAKirk RockWAMalyallingWAWickepinWAWogolinWA Postcode 6370 State or territory Western Australia (WA) Localities 5 Council area Wickepin Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6369 · Postcode 6372