SSA will not issue SSNs beginning with the number “9”. SSA will not issue SSNs beginning with the number “666” in positions 1 – 3. SSA will not issue SSNs beginning with the number “000” in positions 1 – 3. ... SSA will not issue SSNs with the number “0000” in positions 6 – 9.

What does a Social Security number starting with 9 mean?

When an employer receives a W-4 form listing a Social Security Number that begins with a “9”, the employer should recognize that this is an ITIN and it cannot be used when filing W-2 forms. However, if this is the only number provided, the SSA advises employers to use it.

Is SSN 9 or 10 digits?

The SSN is a 10-digit number, issued by the Social Security Administration, a U.S. government agency, that is used to track tax payments and issuance of benefits for U.S. citizens, permanent residents ("Green Card" holders), and other resident and non-resident aliens with work authorization.