1. Log in to the social security online service hall, click "File Query", enter personal information, and you can query your own file query number.
2. Go to the local social security system and check the information of the filing card in the personal file, and you can check the number of the holder of the filing card.
3. Call the customer service phone of the local social security bureau and consult the staff of the local social security bureau to find out the situation of the filing card and how to inquire the number of the cardholder of the filing card.
4. Go to the local social security bureau for consultation. With my valid certificate and social security card, you can consult the local social security bureau for the number of registered cardholders.
The above is the number inquiry method for registered cardholders, and I hope it will be helpful to you.