How are the last 4 digits of your social security number determined?
Emma Jordan
Published Mar 27, 2026
The nine-digit SSN is composed of three parts: The first set of three digits is called the Area Number. The second set of two digits is called the Group Number. The final set of four digits is the Serial Number.
What social security numbers are invalid?
An invalid SSN is one that the SSA never assigned. In case you’re wondering, a valid SSN will never look like this: The first three digits as “000,” “666,” or in the 900 series. The second group that consists of two digits as “00.”
Can last 4 digits of SSN be misused?
Scammers can use different ways and means to steal your identity by using the last 4 digits of SSN and DOB. With this information in their hands, they can steal your money, create credit card accounts, take away your hard-earned benefits, and use your name for illegal transactions.
Why is my SSS number invalid?
It could be one of the following reasons: You typed your SSS number incorrectly. Repeat the online registration process. Make sure to provide your 10-digit number in the proper format.
Is it safe to give last 4 digits to Coinbase?
Coinbase is easy to set up but requires some information, including your legal name, home address, date of birth, last four digits of your Social Security number and how you plan to use Coinbase. That’s to comply with federal regulations.
What Social Security numbers are invalid?
How are SSN formatted?
A Social Security Number (SSN) consists of nine digits, commonly written as three fields separated by hyphens: AAA-GG-SSSS. The first three-digit field is called the “area number”. The central, two-digit field is called the “group number”.
What are the last four digits of a Social Security number?
The serial number contains the last four numbers from your Social Security Number. In every group, the digits will go consecutively from as low as 0001 to as high as 9999. The Social Security Number is not something you should give away. These numbers started being used back in 1936.
What is the format for the Social Security number?
The Social Security number is divided into three parts in the format “AAA-GG-SSSS”. the first three digits, is assigned by geographical region. The middle two digits are the Group Number. The last four digits are Serial Numbers represent a straight numerical sequence of digits from 0001 to 9999.
Where can I find the latest social security number?
See the latest Social Security Number Monthly Issuance Table for the latest SSN area ranges issued to date. Alleged Social Security numbers containing area numbers other than those found on that table are impossible. Within each group, the serial numbers (last four (4) digits) run consecutively from 0001 through 9999.
Who is issuing the US Social Security number?
What is US Social Security number? In the United States, The Social Security number (SSN) is a nine-digit number issued to U.S. temporary (working) residents, permanent residents, and citizens. It is issued to an individual by the Social Security Administration.