Home Postcode finder WA Caiguna Caiguna postcode WA Caiguna 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 Caiguna business listing Be the first listing in Caiguna Common questionsWhat is the postcode for Caiguna?Caiguna, WA has the postcode 6443.What state is Caiguna in?Caiguna 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 Caiguna. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.