Legal analysis: Know which company your social security is in: 1, Social Security Center. If you don't know your social security account number, you can bring your ID card to the business halls of social insurance agencies in various districts to inquire. According to relevant regulations, the income and expenditure of social insurance funds are supported by social insurance agencies. 2. Online inquiry, log in to the labor security network or social insurance business website of your city, click the "Personal Social Security Information Inquiry" window, and enter my ID card and password (the password is your social security number or the date of birth of your ID card) to inquire about my insurance information. 3. Telephone consultation: call the labor and social security comprehensive service telephone number "12333" for policy consultation and information inquiry. 4. Touch screen inquiry: If there is a touch screen inquiry system for social insurance in the business halls of social insurance agencies in various districts, swipe your card or enter the card number or ID number according to the screen prompts for inquiry.

Legal basis: Article 74 of the Labor Law of People's Republic of China (PRC), the social insurance fund handling agency collects and pays, manages and operates the social insurance fund according to law, and is responsible for maintaining and increasing the value of the social insurance fund. Social insurance fund supervision institutions shall supervise the income and expenditure, management and operation of social insurance funds according to law. The establishment and responsibilities of social insurance fund handling institutions and social insurance fund supervision institutions shall be prescribed by law. No organization or individual may misappropriate social insurance funds.