Home Postcode finder SA Holder Siding Holder Siding postcode SA Holder Siding is a locality in South Australia covered by postcode 5330. Postcode 5330 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Holder Siding business listing Be the first listing in Holder Siding Common questionsWhat is the postcode for Holder Siding?Holder Siding, SA has the postcode 5330.What state is Holder Siding in?Holder Siding is in South Australia (SA).Does postcode 5330 cover more than one suburb?Yes. Postcode 5330 covers 15 localities, so the postcode alone does not identify Holder Siding. Browse other postcodes in South Australia, or widen the search to every Australian postcode.