SPARTA — WI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BRIGHTSPEED OF MIDWEST WISCONSIN, LLC | 0913 | 3 |
| TDS METROCOM, LLC | 520K | 1 |
| UNITED STATES CELLULAR - WI | 6274 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |