HIGHLAND — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - IL | 1015 | 2 |
| METROPCS, INC. | 5562 | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - IL | 1015 | 2 |
| METROPCS, INC. | 5562 | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |