Hi Mrs. Maligi,

Your son can get these colleges, according to his rank:(The rank mentioned besides the branch is closing rank of last year)

Indian Institute of Technology Indore    B.Tech. - Computer Science and Engineering (4 years)    1500
Indian Institute of Technology Gandhinagar    B.Tech. - Computer Science and Engineering (4 years)    1736
Indian Institute of Technology Ropar    B.Tech. - Computer Science and Engineering (4 years)    2029
Indian Institute of Technology Mandi    B.Tech. - Computer Science and Engineering (4 years)    2587
Indian Institute of Technology Bhubaneswar    B.Tech. - Computer Science and Engineering (4 years)    2695
Indian Institute of Technology Patna    B.Tech. - Computer Science and Engineering (4 years)    3298
Indian Institute of Technology Jodhpur    B.Tech. - Computer Science and Engineering (4 years)    3341
Indian Institute of Technology Bhubaneswar    B.Tech. + M.Tech. - Computer Science and Engineering (5 years)    3355
Indian Institute of Technology (ISM) Dhanbad    B.Tech. - Computer Science and Engineering (4 years)    3376
Indian Institute of Technology (ISM) Dhanbad    B.Tech. + M.Tech. - Computer Science and Engineering (5 years)    3570
Indian Institute of Technology Tirupati    B.Tech. - Computer Science and Engineering (4 years)    4384
Indian Institute of Technology Goa    B.Tech. - Computer Science and Engineering (4 years)    4825
Indian Institute of Technology Palakkad    B.Tech. - Computer Science and Engineering (4 years)    4962
Indian Institute of Technology Dharwad    B.Tech. - Computer Science and Engineering (4 years)    5386
Indian Institute of Technology Bhilai    B.Tech. - Computer Science and Engineering (4 years)    5940

Indian Institute of Technology Jammu    B.Tech. - Computer Science and Engineering (4 years)    6687

Hope it helps.