Home Postcode finder WA Wittenoom Hills Wittenoom Hills postcode WA Wittenoom Hills is a locality in Western Australia covered by postcode 6447. Postcode 6447 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Wittenoom Hills business listing Be the first listing in Wittenoom Hills Common questionsWhat is the postcode for Wittenoom Hills?Wittenoom Hills, WA has the postcode 6447.What state is Wittenoom Hills in?Wittenoom Hills is in Western Australia (WA).Does postcode 6447 cover more than one suburb?Yes. Postcode 6447 covers 4 localities, so the postcode alone does not identify Wittenoom Hills. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.