Home Postcode finder WA Zanthus Zanthus postcode WA Zanthus is a locality in Western Australia covered by postcode 6434. Postcode 6434 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Zanthus business listing Be the first listing in Zanthus Common questionsWhat is the postcode for Zanthus?Zanthus, WA has the postcode 6434.What state is Zanthus in?Zanthus is in Western Australia (WA).Does postcode 6434 cover more than one suburb?Yes. Postcode 6434 covers 5 localities, so the postcode alone does not identify Zanthus. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.