Home Postcode finder SA Antechamber Bay Antechamber Bay postcode SA Antechamber Bay is a locality in South Australia covered by postcode 5222. Postcode 5222 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Antechamber Bay business listing Be the first listing in Antechamber Bay Common questionsWhat is the postcode for Antechamber Bay?Antechamber Bay, SA has the postcode 5222.What state is Antechamber Bay in?Antechamber Bay is in South Australia (SA).Does postcode 5222 cover more than one suburb?Yes. Postcode 5222 covers 17 localities, so the postcode alone does not identify Antechamber Bay. Browse other postcodes in South Australia, or widen the search to every Australian postcode.