southside postcode qld Home ›› Postcode Finder ›› QLD ›› Southside Southside local listingsThe suburb of Southside is located in QLD and has a postcode of 4570. Free southside business listing! 1Built Right Solutions Pty Ltd5 Gardenia Ct (07) 5482 0714 View more business listings in southside Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.