I've passed my class 10th from cbse board and i want to know my registration number

If you've passed Class 10 from CBSE and don't remember your registration number , you can retrieve it using one of these methods:

• Check your Class 10 admit card – the registration number is printed on it.
• Look at your school records – your school should have your registration details.
• Check DigiLocker if your CBSE documents are available there.
• Contact your school or the CBSE Regional Office if you cannot find it anywhere.