Home Postcode finder NSW Mullaway Mullaway postcode NSW Mullaway is a locality in New South Wales covered by postcode 2456. Postcode 2456 State or territory New South Wales (NSW) Region NSW North Coast Add a free Mullaway business listing More business listings in Mullaway Businesses in MullawayMullaway Public SchoolOld Pacific Hwy · 02 66540377 Common questionsWhat is the postcode for Mullaway?Mullaway, NSW has the postcode 2456.What state is Mullaway in?Mullaway is in New South Wales (NSW).Does postcode 2456 cover more than one suburb?Yes. Postcode 2456 covers 10 localities, so the postcode alone does not identify Mullaway. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.