MONTICELLO — IA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MCC TELEPHONY LLC | 593K | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| QWEST CORPORATION | 9631 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| MCC TELEPHONY LLC | 593K | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| QWEST CORPORATION | 9631 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | 1 |