SPARTA — MI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| AT&T ENTERPRISES, LLC | 516C | 1 |
| METROPCS, INC. | 5562 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | 1 |
| INTERACTIVE SERVICES NETWORK, INC. | 817J | 1 |