What the state code in your Social Security number means

Your Social Security number contains a three-digit area code that originally indicated the state where you applied for the number, not where you were born or currently live. The Social Security Administration assigned these codes based on the location of the field office that processed your application. If you applied in California, your area code reflected a California range. If you moved to Texas the next year, your number stayed the same.

This system has been largely obsolete since 2011, when the SSA randomized new Social Security number assignments. But millions of people still hold numbers issued under the old geographic system, and understanding what your number's area code represents can help you verify your own information or understand historical records.

The area code is the first three digits of your nine-digit Social Security number. The next two digits are the group number, and the final four are the serial number. Only the first three digits carry state information under the old system.

Key Takeaways

  • The first three digits of your Social Security number indicate the state where you applied for the number, not where you were born or currently live.
  • This geographic assignment system ended in 2011; new numbers are now assigned randomly regardless of location.
  • Each state had a specific range of area codes, and some states shared ranges or had multiple ranges depending on population size.
  • You can cross-reference your area code against a state-by-state table to learn which state's field office issued your number.
  • Knowing your area code does not change your benefits, rights, or how your Social Security number functions.

State codes and their area code ranges

The Social Security Administration assigned area codes in rough geographic order from east to west and north to south. The lowest area codes went to the northeastern states, and the highest went to the western states. This was not a perfect system—some states received multiple ranges because of population size, and some ranges were shared or skipped.

Alabama received area codes 416–424. Alaska received 574–576. Arizona received 601–605. Arkansas received 667–675. California received the largest range: 545–573. Colorado received 521–524. Connecticut received 040–049. Delaware received 221–222. Florida received 261–267 and 589–595. Georgia received 252–260. Hawaii received 575–576. Idaho received 518–519. Illinois received 318–361. Indiana received 303–317. Iowa received 478–485. Kansas received 509–515. Kentucky received 400–407. Louisiana received 696–699. Maine received 004–007. Maryland received 212–220. Massachusetts received 010–034. Michigan received 362–386. Minnesota received 468–477. Mississippi received 426–428. Missouri received 486–500. Montana received 516–517. Nebraska received 501–502. Nevada received 530–539. New Hampshire received 001–003. New Jersey received 135–158. New Mexico received 525–529. New York received 050–134. North Carolina received 232–246. North Dakota received 501–502. Ohio received 268–302. Oklahoma received 440–448. Oregon received 540–544. Pennsylvania received 159–211. Rhode Island received 035–039. South Carolina received 247–251. South Dakota received 501–502. Tennessee received 408–415. Texas received 408–415 and 627–645. Utah received 528–529. Vermont received 008–009. Virginia received 223–231. Washington received 531–539. West Virginia received 223–231. Wisconsin received 387–399. Wyoming received 516–517.

Some states shared ranges or had overlapping assignments because the system was built incrementally over decades. If your area code falls within a range assigned to two states, the exact state depends on when your number was issued and which field office processed it.

How to find your state code from your Social Security number

Write down the first three digits of your Social Security number. This is your area code. Then locate that three-digit number in the state-by-state ranges listed above. The state name next to that range is the state where the Social Security field office that issued your number was located.

For example, if your area code is 047, you would find that 047 falls within Connecticut's range of 040–049. This means you applied for your Social Security number at a Connecticut field office. If your area code is 415, you would see that 415 falls within both Tennessee's range (408–415) and Texas's range (408–415 and 627–645). In this case, the state depends on the exact year you applied and which office processed it; you would need to contact the Social Security Administration directly to confirm.

Remember that this information reflects only where you applied for the number, not where you were born, where you currently live, or any other personal detail. The area code has no bearing on your benefits, your may be able to access for programs, or how your Social Security number works.

Why the state code system was replaced

The Social Security Administration used geographic area codes for decades because it helped organize their filing system and track applications by region. As the population grew and people moved more frequently, the system became less useful. By the early 2000s, the SSA recognized that the geographic system was outdated and that randomizing assignments would improve security and reduce fraud.

In June 2011, the SSA stopped assigning area codes based on geography. All new Social Security numbers issued after that date are assigned randomly, with no connection to the applicant's location. This change affected only new numbers; existing numbers retained their original area codes.

The randomization also made it harder for people to guess or fabricate Social Security numbers based on where someone lived or when they were born. Under the old system, someone could make educated guesses about the first three digits based on a person's state of residence. The random system eliminated that vulnerability.

What the other digits in your Social Security number mean

After the three-digit area code, your Social Security number contains five more digits: a two-digit group number and a four-digit serial number. These digits were also assigned in a specific pattern under the old system, though the pattern was more complex than the area code.

The group number (digits 4–5) was assigned in a non-sequential order to prevent predictability. The serial number (digits 6–9) was assigned sequentially within each group. Together, these five digits created a unique identifier within each area code.

Like the area code, the group and serial numbers have no meaning beyond their role in creating a unique identifier. They do not encode your birth date, your gender, your race, or any other personal information. The entire nine-digit number is simply a unique tag assigned to you by the Social Security Administration.

Frequently Asked Questions

Does my Social Security number's state code affect my benefits?

No. The state code reflects only where you applied for the number, not where you live now or where you receive benefits. Your benefits are determined by your work history, age, and other factors—not by the geographic code in your number.

Can I change my Social Security number if I don't like the state code?

The Social Security Administration rarely issues a new number. You would need to show that someone is using your number fraudulently or that you have a religious or cultural objection to your current number. A state code you do not like is not a valid reason for a replacement.

If my area code is from a state I've never lived in, does that mean something is wrong?

No. You applied for your number at a field office in that state, but you may have moved there temporarily, applied by mail, or had someone apply on your behalf. The area code simply marks where the application was processed, not where you were living at the time or where you were born.

What if my area code doesn't match any state range?

Area codes 000, 666, and 900–999 were never assigned to any state. If your Social Security number begins with one of these, your number was issued after 2011 under the randomized system, and the area code has no geographic meaning.

How do I verify that my Social Security number is real?

You cannot verify a Social Security number's authenticity based on its format or state code alone. If you need to confirm that a number is valid, you would need to contact the Social Security Administration directly or work with an employer or government agency that has access to SSA verification systems.