Home Postcode finder NSW Mullamuddy Mullamuddy postcode NSW Mullamuddy is a locality in New South Wales covered by postcode 2850. Postcode 2850 State or territory New South Wales (NSW) Region NSW Country West Add a free Mullamuddy business listing Be the first listing in Mullamuddy Common questionsWhat is the postcode for Mullamuddy?Mullamuddy, NSW has the postcode 2850.What state is Mullamuddy in?Mullamuddy is in New South Wales (NSW).Does postcode 2850 cover more than one suburb?Yes. Postcode 2850 covers 77 localities, so the postcode alone does not identify Mullamuddy. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.