Home Postcode finder WA Paynesville Paynesville postcode WA Paynesville is a locality in Western Australia covered by postcode 6638. Postcode 6638 State or territory Western Australia (WA) Region North West Suburbs Add a free Paynesville business listing Be the first listing in Paynesville Common questionsWhat is the postcode for Paynesville?Paynesville, WA has the postcode 6638.What state is Paynesville in?Paynesville is in Western Australia (WA).Does postcode 6638 cover more than one suburb?Yes. Postcode 6638 covers 4 localities, so the postcode alone does not identify Paynesville. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.