Home Postcode finder SA Caltowie North Caltowie North postcode SA Caltowie North is a locality in South Australia covered by postcode 5490. Postcode 5490 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Caltowie North business listing Be the first listing in Caltowie North Common questionsWhat is the postcode for Caltowie North?Caltowie North, SA has the postcode 5490.What state is Caltowie North in?Caltowie North is in South Australia (SA).Does postcode 5490 cover more than one suburb?Yes. Postcode 5490 covers 3 localities, so the postcode alone does not identify Caltowie North. Browse other postcodes in South Australia, or widen the search to every Australian postcode.