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