Where can I find my social security number? March 15, 2022 16:13 Updated You can find the social security number on the customer card of your health insurance company, on your pay slip, on your OASI card or on the personal ID card of your pension fund. Related articles Registration with ePlix The message "ZAS and ID do not match." appears. Delete my ePlix profile Which IDs can I use to register for ePlix ? I have a new mobile number/email address. How can I update my existing information in ePlix?