How to check the social security number of the citizen card?

Call social security. You can check it where you can swipe your medical insurance card. Some pharmacies will only check for you if you want to buy medicine. Or go to the hospital and register with a citizen card, which is on the registration form, and then return the registration form.

The above three methods are for reference!

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.