How can I check whether my mobile phone number has a real-name registration?

You can log in to the online business hall and view your personal information. Because if there is no real-name system, you will be prompted to use the real-name system after logging in, and if there is no real-name system, your personal information will not have your information.

If the card is in your hand, call 10086 for manual service and ask the salesperson to change your password, and then log in to the online business hall to check. If the card is no longer in your hand, you can only contact the person who issued the card. Asked for the password, then check it yourself.