The Institute of Cost Accountants of India (CMA) has been updated old alpha numeric (like ERS/001***) Registration Number to 11 Digit Numeric Registration Number. This conversion applicable only for students who are pursuing courses, not for the students who are already qualified.

To check 11 Digit New Registration number, students must know and enter old alpha numeric Registration Number (like ERS/******).

To check 11 digit New Registration Number, please visit under mentioned link..
http://eicwai.org/Student_Reg/StudReg.aspx 
UPDATE :- This link is not working properly. Please ignore this link.