old-toongabbie postcode nswst Home ›› Postcode Finder ›› NSWST ›› Old-Toongabbie Old Toongabbie local listingsThe suburb of Old Toongabbie is located in NSW and has a postcode of 2146. Free old toongabbie business listing! Get the first free listing in old toongabbie! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.