Home Postcode finder NT Johnston Johnston postcode NT Johnston is a locality in Northern Territory covered by postcode 0832. Postcode 0832 State or territory Northern Territory (NT) Region Darwin Add a free Johnston business listing Be the first listing in Johnston Common questionsWhat is the postcode for Johnston?Johnston, NT has the postcode 0832.What state is Johnston in?Johnston is in Northern Territory (NT).Does postcode 0832 cover more than one suburb?Yes. Postcode 0832 covers 8 localities, so the postcode alone does not identify Johnston. Browse other postcodes in Northern Territory , or widen the search to every Australian postcode.