W CHESTER — PA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON PENNSYLVANIA, INC. | 9208 | 15 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 9 |
| PAETEC ITEL, LLC | 829J | 7 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | 6 |
| LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | 5 |