Home Postcode finder NSWDL Firefly Firefly postcode NSWDL Firefly is a locality in New South Wales covered by postcode 2429. Postcode 2429 State or territory New South Wales (NSWDL) Region Hunter Add a free Firefly business listing Be the first listing in Firefly Common questionsWhat is the postcode for Firefly?Firefly, NSWDL has the postcode 2429.What state is Firefly in?Firefly is in New South Wales (NSWDL).Does postcode 2429 cover more than one suburb?Yes. Postcode 2429 covers 32 localities, so the postcode alone does not identify Firefly. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.