FITCHBURG — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER MIDSTATES, INC. - MI | 0681 | 1 |
| ACD TELECOM, INC. - MI | 3535 | 1 |
| TELNET WORLDWIDE, INC. | 817J | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER MIDSTATES, INC. - MI | 0681 | 1 |
| ACD TELECOM, INC. - MI | 3535 | 1 |
| TELNET WORLDWIDE, INC. | 817J | 1 |