Home Postcode finder WA Feysville Feysville postcode WA Feysville is a locality in Western Australia covered by postcode 6431. Postcode 6431 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Feysville business listing Be the first listing in Feysville Common questionsWhat is the postcode for Feysville?Feysville, WA has the postcode 6431.What state is Feysville in?Feysville is in Western Australia (WA).Does postcode 6431 cover more than one suburb?Yes. Postcode 6431 covers 13 localities, so the postcode alone does not identify Feysville. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.