Home Postcode finder NSWDL Gum Flat Gum Flat postcode NSWDL Gum Flat is a locality in New South Wales covered by postcode 2360. Postcode 2360 State or territory New South Wales (NSWDL) Region NSW North Coast Add a free Gum Flat business listing Be the first listing in Gum Flat Common questionsWhat is the postcode for Gum Flat?Gum Flat, NSWDL has the postcode 2360.What state is Gum Flat in?Gum Flat is in New South Wales (NSWDL).Does postcode 2360 cover more than one suburb?Yes. Postcode 2360 covers 27 localities, so the postcode alone does not identify Gum Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.