Hello sir, 

For your son's rank he can get admission in following colleges in Computer science and engineering course or electronics and communication engineering course :

• Dayanand Sagar College of Engineering and Technology
• Sri Krishna Rajendra silver jubilee Technological University
• Kls gogte Institute of Technology
• Sjb college of Engineering 
• Malnad college of Engineering
• Nitte Engineering College 
• St. Joseph Engineering College 

For more details about the colleges use - https://www.careers360.com/kcet-college-predictor