Home Postcodes by state WA 6027 Postcode 6027 6027 is the postcode for 7 localities in WA: Beldon, Connolly, Edgewater, Heathridge, Joondalup, Mullaloo and 1 more. Localities with postcode 6027BeldonWAConnollyWAEdgewaterWAHeathridgeWAJoondalupWAMullalooWAOcean ReefWA Postcode 6027 State or territory Western Australia (WA) Localities 7 Council area Joondalup Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6026 · Postcode 6028