An invalid Social Security number is one that we never assigned.
On June 25, 2011, we began assigning Social Security numbers differently than in the past. Today, Social Security numbers are assigned through a randomized process.
However, there are some 9 digit numbers that we do not include in our randomized process. We do not assign a Social Security number with the first three digits of:
-
000
-
666
-
900 - 999
Nor do we assign Social Security number with "00" in the fourth and fifth position, or "0000" in the last four positions of the numbers.
Additionally, prior to June 25, 2011, we had never assigned a Social Security number with the first three digits of:
- 000
- 666
- 772 - 799
- 800 - 899
- 900 - 999
Employers can use the Social Security Number Verification Service to verify the names and Social Security numbers of former and current employees.
More Information
Social Security Number Randomization Frequently Asked Questions
Give us some feedback.
Sorry, we cannot respond to your feedback.
Call Us
E-mail Us
Find an Office
Write Us
You are exiting the Social Security Administration's website.
Select OK to proceed.
Disclaimer
The Social Security Administration (SSA) website contains links to websites not affiliated with the United States government. These may include State and Local governmental agencies, international agencies, and private entities.
SSA cannot attest to the accuracy of information provided by such websites. If we provide a link to such a website, this does not constitute an endorsement by SSA or any of its employees of the information or products presented on the non-SSA website.
Also, such websites are not within our control and may not follow the same privacy, security or accessibility policies. Once you visit such a website, you are subject to the policies of that site.