The card number of Nanjing Social Security Card is only 9 digits, and the query needs 10 digits.

The length of the social security number is 10, and the insured places are municipal and the nine insured places are county.

The reasons why the social security personal number is 9 digits are as follows:

1, social security card number has different definitions in different places, and the numbering rules are different. Some directly use the employee ID number as the social security card number; There are three numbers on the social security card, namely card number, computer number and employee ID number. The card number is 10, while the computer number is fixed, with 9 digits and 7 digits.