Visit the UIDAI website
Go to the Aadhaar services section
Select the option to verify your mobile number
Enter your Aadhaar number and the mobile number you want to check
Enter the captcha code
Submit the details
If the number is linked, the system will confirm it
If the number is not linked, the system will show an error or mismatch message
You can also visit an Aadhaar Seva Kendra for assistance
Carry your Aadhaar card and valid ID proof when visiting the center