ARMSTRONG — MO
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | 1 |
| SOUTHWESTERN BELL | 9533 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | 1 |
| SOUTHWESTERN BELL | 9533 | 1 |