Home Postcode finder WA Carrabin Carrabin postcode WA Carrabin is a locality in Western Australia covered by postcode 6423. Postcode 6423 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Carrabin business listing Be the first listing in Carrabin Common questionsWhat is the postcode for Carrabin?Carrabin, WA has the postcode 6423.What state is Carrabin in?Carrabin is in Western Australia (WA).Does postcode 6423 cover more than one suburb?Yes. Postcode 6423 covers 4 localities, so the postcode alone does not identify Carrabin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.