Home Postcode finder WA Jennacubbine Jennacubbine postcode WA Jennacubbine 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 Jennacubbine business listing Be the first listing in Jennacubbine Common questionsWhat is the postcode for Jennacubbine?Jennacubbine, WA has the postcode 6401.What state is Jennacubbine in?Jennacubbine 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 Jennacubbine. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.