JOHNSBURG — WI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH INC. - WI | 0886 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | 1 |
| CHARTER IP ENABLED SERVICES, LLC | 792K | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH INC. - WI | 0886 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | 1 |
| CHARTER IP ENABLED SERVICES, LLC | 792K | 1 |