Home Postcode finder WA Malabaine Malabaine postcode WA Malabaine is a locality in Western Australia covered by postcode 6401. Postcode 6401 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Malabaine business listing Be the first listing in Malabaine Common questionsWhat is the postcode for Malabaine?Malabaine, WA has the postcode 6401.What state is Malabaine in?Malabaine is in Western Australia (WA).Does postcode 6401 cover more than one suburb?Yes. Postcode 6401 covers 18 localities, so the postcode alone does not identify Malabaine. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.