ONTARIO — WI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BRIGHTSPEED OF MIDWEST WISCONSIN, LLC | 0913 | 1 |
| MCC TELEPHONY OF THE MIDWEST, LLC - WI | 983F | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| BRIGHTSPEED OF MIDWEST WISCONSIN, LLC | 0913 | 1 |
| MCC TELEPHONY OF THE MIDWEST, LLC - WI | 983F | 1 |