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