semaphore-south postcode sa Home ›› Postcode Finder ›› SA ›› Semaphore-South Semaphore South local listingsThe suburb of Semaphore South is located in SA and has a postcode of 5019. Free semaphore south business listing! Get the first free listing in semaphore south! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.