CALUMET — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MICHIGAN BELL TEL CO | 9323 | 2 |
| VONAGE AMERICA LLC | 197D | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| RANGE TELECOMMUNICATIONS | 6695 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| MICHIGAN BELL TEL CO | 9323 | 2 |
| VONAGE AMERICA LLC | 197D | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| RANGE TELECOMMUNICATIONS | 6695 | 1 |