Home Postcode finder WA Mueller Ranges Mueller Ranges postcode WA Mueller Ranges is a locality in Western Australia covered by postcode 6770. Postcode 6770 State or territory Western Australia (WA) Region North West Suburbs Add a free Mueller Ranges business listing Be the first listing in Mueller Ranges Common questionsWhat is the postcode for Mueller Ranges?Mueller Ranges, WA has the postcode 6770.What state is Mueller Ranges in?Mueller Ranges is in Western Australia (WA).Does postcode 6770 cover more than one suburb?Yes. Postcode 6770 covers 7 localities, so the postcode alone does not identify Mueller Ranges. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.