If it is your own mobile phone number, it is very simple. Both the customer service phone number and the operator official website can directly inquire; If it's not your mobile phone number, you can check it on the website. This is a paid inquiry. 3 yuan can inquire once. As shown in the figure below:
Enter the mobile phone number and select the payment method to get the result, as shown below.
If you have a large number, it is recommended to register as a member, and there are still many discounts.