What is the 9-digit code on the social security card?

This code is the social security personal number, which is the card number of the social security card.

This number is a "personal number" automatically generated by the system after social security registration, which represents the personal information of the cardholder. Through this number, you can query the cardholder's social security card number and other related information, and almost all social security services are queried through this number.

Please note that the definition and numbering rules of social security card numbers vary from place to place, and the digits and meanings of specific numbers may be different due to different regions and card issuing units.