upper-bylong postcode nswdl Home ›› Postcode Finder ›› NSWDL ›› Upper-Bylong Upper Bylong local listingsThe suburb of Upper Bylong is located in NSW and has a postcode of 2849. Free upper bylong business listing! Get the first free listing in upper bylong! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.