Unitech's sez is in Village Kunnathunadu, Taluk Morkala Desam, Ernakulam, Kerala as per this govt site.The sez is on 27 acres of land and has been approved by the central govt.
http://sezindia.nic.in/Updated-state...-Formal%20.pdf
Sez status has been accorded to smart city project which spans over a 1000 acres,parsvnath-77acres,TCG-25scres,port trust,CPT(vallarpadam,puthuvypeen) sez-1000acres,Infopark-100acres,KINFRA-electronics-32acres,Sutherland-25 acres etc.
A report from from realty consultancy firm chesterton meghraj on major ITES/IT hubs in India.
http://www.chestertonmeghraj.com/dow...20Snapshot.pdf