bylong postcode nswst Home ›› Postcode Finder ›› NSWST ›› Bylong Bylong local listingsThe suburb of Bylong is located in NSW and has a postcode of 2849. Free bylong business listing! 1Bylong Upper Public School543 Upper Bylong Rd 02 63798256 View more business listings in bylong Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.