Home Postcode finder WA Quindanning Quindanning postcode WA Quindanning is a locality in Western Australia covered by postcode 6391. Postcode 6391 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Quindanning business listing Be the first listing in Quindanning Common questionsWhat is the postcode for Quindanning?Quindanning, WA has the postcode 6391.What state is Quindanning in?Quindanning is in Western Australia (WA).Does postcode 6391 cover more than one suburb?Yes. Postcode 6391 covers 2 localities, so the postcode alone does not identify Quindanning. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.