Home Postcode finder WA Dundas Dundas postcode WA Dundas is a locality in Western Australia covered by postcode 6443. Postcode 6443 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Dundas business listing Be the first listing in Dundas Common questionsWhat is the postcode for Dundas?Dundas, WA has the postcode 6443.What state is Dundas in?Dundas is in Western Australia (WA).Does postcode 6443 cover more than one suburb?Yes. Postcode 6443 covers 11 localities, so the postcode alone does not identify Dundas. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.