You can go to the institute & give them your CA's membership no. & request them to tell you who all are registered under him. Don't forget to take your CA's approval letter, otherwise they won't tell you.

https://220.227.161.82/locm_article.asp?MRH_MRN=123456

replace 123456 with the 6 digit membership number. It will show you the names of students who had registered under a particular CA, some may have completed their articleship or, some might have taken transfer.

student wise

https://220.227.161.82/student_details.asp?SRN=WRO0113951