Social Security Number Prefixes by State
Prefix Lookup
Search historical SSN area numbers
| Prefix | State Code | State Name |
|---|---|---|
| 718 | RR | Railroad Board |
| 719 | RR | Railroad Board |
| 720 | RR | Railroad Board |
| 721 | RR | Railroad Board |
| 722 | RR | Railroad Board |
| 723 | RR | Railroad Board |
| 724 | RR | Railroad Board |
| 725 | RR | Railroad Board |
| 726 | RR | Railroad Board |
| 727 | RR | Railroad Board |
| 728 | RR | Railroad Board |
| 729 | EE | Enumeration at Entry |
| 730 | EE | Enumeration at Entry |
| 731 | EE | Enumeration at Entry |
| 732 | EE | Enumeration at Entry |
| 733 | EE | Enumeration at Entry |