mayfield-east postcode nswst Home ›› Postcode Finder ›› NSWST ›› Mayfield-East Mayfield East local listingsThe suburb of Mayfield East is located in NSW and has a postcode of 2304. Free mayfield east business listing! Get the first free listing in mayfield east! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.