Home Postcode finder WA Mount Ney Mount Ney postcode WA Mount Ney is a locality in Western Australia covered by postcode 6447. Postcode 6447 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Mount Ney business listing Be the first listing in Mount Ney Common questionsWhat is the postcode for Mount Ney?Mount Ney, WA has the postcode 6447.What state is Mount Ney in?Mount Ney is in Western Australia (WA).Does postcode 6447 cover more than one suburb?Yes. Postcode 6447 covers 4 localities, so the postcode alone does not identify Mount Ney. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.