12000 rank is quite good in AP EAMCET to get Computer Science and Engineering in a good Engineering college. Now going by the previous cutoffs, you can expect Computer Science and Engineering in GMR Institute of Technology, Sarojini Institute of Technology, Audisankara College of Engineering and Technology, Srinivasa Ramanujan Institute of Technology, Vishnu Institute of Technology, Maharaj Vijayaram Gajapathi Raj College of Engineering, Prasad V Potluri Siddhartha Institute of Technology and the list is quite long. So I would suggest you to use the Ap EAMCET College Predictor to know about your admission possibilities