Home Postcode finder NSW Maianbar Maianbar postcode NSW Maianbar is a locality in New South Wales covered by postcode 2230. Postcode 2230 State or territory New South Wales (NSW) Region Illawarra Add a free Maianbar business listing Be the first listing in Maianbar Common questionsWhat is the postcode for Maianbar?Maianbar, NSW has the postcode 2230.What state is Maianbar in?Maianbar is in New South Wales (NSW).Does postcode 2230 cover more than one suburb?Yes. Postcode 2230 covers 5 localities, so the postcode alone does not identify Maianbar. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.