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