COLUMBIA — IL
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| HARRISONVILLE TEL. CO. | 1026 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| HARRISONVILLE TEL. CO. | 1026 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 1 |