Home Postcodes by state WA 6024 Postcode 6024 6024 is the postcode for 2 localities in WA: Greenwood and Warwick. Localities with postcode 6024GreenwoodWAWarwickWA Postcode 6024 State or territory Western Australia (WA) Localities 2 Council area Joondalup Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6023 · Postcode 6025