Home Postcode finder NSW Old Toongabbie Old Toongabbie postcode NSW Old Toongabbie is a locality in New South Wales covered by postcode 2146. Postcode 2146 State or territory New South Wales (NSW) Region Seven Hills Add a free Old Toongabbie business listing More business listings in Old Toongabbie Businesses in Old ToongabbieFacebook Technical Service Number 1-800-778-9936New South Wales · 1-800-778-9936RW Computer Services123 Bogalara Rd · 0447297300Yahoo Support Phone NumberNew South Wales · +1-888-414-3820 Common questionsWhat is the postcode for Old Toongabbie?Old Toongabbie, NSW has the postcode 2146.What state is Old Toongabbie in?Old Toongabbie is in New South Wales (NSW).Does postcode 2146 cover more than one suburb?Yes. Postcode 2146 covers 3 localities, so the postcode alone does not identify Old Toongabbie. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.