upper-main-arm postcode nsw Home ›› Postcode Finder ›› NSW ›› Upper-Main-Arm Upper Main Arm local listingsThe suburb of Upper Main Arm is located in NSW and has a postcode of 2482. Free upper main arm business listing! Get the first free listing in upper main arm! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.