Home Postcodes by state WA 6149 Postcode 6149 6149 is the postcode for 2 localities in WA: Bull Creek and Leeming. Localities with postcode 6149Bull CreekWALeemingWA Postcode 6149 State or territory Western Australia (WA) Localities 2 Council area Melville; Mainly Melville, partly Cockburn Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6148 · Postcode 6150