DAUPHIN — PA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | 1 |
| WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 1 |
| VERIZON PENNSYLVANIA, INC. | 9208 | 1 |