Home Postcodes by state WA 6564 Postcode 6564 6564 is the postcode for Clackline, WA. Localities with postcode 6564ClacklineWA Postcode 6564 State or territory Western Australia (WA) Localities 1 Council area Northam Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6562 · Postcode 6566