Home Postcodes by state WA 6413 Postcode 6413 6413 is the postcode for Hines Hill, WA. Localities with postcode 6413Hines HillWA Postcode 6413 State or territory Western Australia (WA) Localities 1 Council area Merredin Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6412 · Postcode 6414