GLENBROOK — NV
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV | 4421 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - NV | 4805 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV | 4421 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - NV | 4805 | 1 |