tewinga postcode nswst Home ›› Postcode Finder ›› NSWST ›› Tewinga Tewinga local listingsThe suburb of Tewinga is located in NSW and has a postcode of 2449. Free tewinga business listing! Get the first free listing in tewinga! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.