Hey!

You could recover your college registeration number by checking your mail inbox from which you had registered. You must have received a mail regarding your registeration in which you may find your details such as registeration number.

In case you are not able to find the mail, then you may contact the college or administration through the help desk. They must have provided email and phone number on their respective website.

And in case you forgot your password then you may click on the forgot password option to recover your registeration details.