Social Security Number Prefixes by State
Prefix Lookup
Search historical SSN area numbers
| Prefix | State Code | State Name |
|---|---|---|
| 506 | NE | Nebraska |
| 507 | NE | Nebraska |
| 508 | NE | Nebraska |
| 509 | KS | Kansas |
| 510 | KS | Kansas |
| 511 | KS | Kansas |
| 512 | KS | Kansas |
| 513 | KS | Kansas |
| 514 | KS | Kansas |
| 515 | KS | Kansas |
| 516 | MT | Montana |
| 517 | MT | Montana |
| 518 | ID | Idaho |
| 519 | ID | Idaho |
| 520 | WY | Wyoming |
| 521 | CO | Colorado |
| 522 | CO | Colorado |
| 523 | CO | Colorado |
| 524 | CO | Colorado |
| 525 | NM | New Mexico |