Home Postcode finder NSW Munni Munni postcode NSW Munni is a locality in New South Wales covered by postcode 2420. Postcode 2420 State or territory New South Wales (NSW) Region Hunter Add a free Munni business listing Be the first listing in Munni Common questionsWhat is the postcode for Munni?Munni, NSW has the postcode 2420.What state is Munni in?Munni is in New South Wales (NSW).Does postcode 2420 cover more than one suburb?Yes. Postcode 2420 covers 23 localities, so the postcode alone does not identify Munni. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.