Visit the UIDAI website
Go to the Aadhaar services section
Select the option to verify mobile number or email linked to Aadhaar
Enter your Aadhaar number
Enter the mobile number you want to check
Complete the OTP verification if prompted
If the number is linked, the system will confirm it
If the number is not linked, the system will show that it is not registered
You can also visit an Aadhaar Enrolment or Update Centre for assistance
Carry your Aadhaar card and valid ID proof if required