Home Postcodes by state WA 6077 Postcode 6077 6077 is the postcode for 2 localities in WA: Gnangara and Jandabup. Localities with postcode 6077GnangaraWAJandabupWA Postcode 6077 State or territory Western Australia (WA) Localities 2 Council area Wanneroo Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6076 · Postcode 6078