Get Aadhaar number on your registered mobile for ready reckon:

• Visit portal.uidai.gov.in/ResidentPortal/getstatusLink
• Key in your enrollment id, registered mobile number and the captcha image text.

• Enter the one time password (OTP) received on your mobile.

• You should receive an sms on your mobile with your Aadhaar number, something like

Dear Nitin Kumar Jain, Your aadhaar number is xxxxxxxxxxxx

Other Aadhaar card services that are available online.