southside postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Southside Southside local listingsThe suburb of Southside is located in QLD and has a postcode of 4570. Free southside business listing! 1Southern Cross Electrical Data109 Groundwater Rd, Southside QLD 4570, Australia 04129322712Pro Shield Pest Management118 Groundwater Rd, Southside QLD 4570, Australia 61 40 880 52313Built 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.