Home Postcodes by state WA 6517 Postcode 6517 6517 is the postcode for Carnamah, WA. Localities with postcode 6517CarnamahWA Postcode 6517 State or territory Western Australia (WA) Localities 1 Council area Carnamah Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6516 · Postcode 6518