Hey yogesh!

As you know registration number is very necessary for a candidate to hace. Since you have lost it , you must contact the college immediately.

Either you should call them 

Phone: 1-855-484-8324
Phone: (225) 752-4233

Or you should send them a mail  at techsupport@iticollege.edu

elaborating your problem . They will soon reply you with a solution.

For more information, follow the given link :

https://www.iticollege.edu/contact-us/