FONDDU LAC — WI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| WISCONSIN BELL INC | 9327 | 9 |
| UNITED STATES CELLULAR - WI | 6274 | 5 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | 4 |
| TDS METROCOM, LLC | 520K | 2 |
| METROPCS, INC. | 5562 | 2 |