| City | Area Code | Dialing Code |
|---|---|---|
| Allentown | 484 | +1 484 |
| Allentown | 610 | +1 610 |
| Altoona | 814 | +1 814 |
| Back Mountain | 272 | +1 272 |
| Back Mountain | 570 | +1 570 |
| Bethel Park | 412 | +1 412 |
| Bethel Park | 878 | +1 878 |
| Bethlehem | 484 | +1 484 |
| Bethlehem | 610 | +1 610 |
| Drexel Hill | 484 | +1 484 |
| Drexel Hill | 610 | +1 610 |
| Easton | 484 | +1 484 |
| Easton | 610 | +1 610 |
| Erie | 814 | +1 814 |
| Harrisburg | 717 | +1 717 |
| Hazleton | 272 | +1 272 |
| Hazleton | 570 | +1 570 |
| Johnstown | 814 | +1 814 |
| Lancaster | 717 | +1 717 |
| Lebanon | 717 | +1 717 |
| Levittown | 215 | +1 215 |
| Levittown | 267 | +1 267 |
| McKeesport | 412 | +1 412 |
| McKeesport | 878 | +1 878 |
| Monroeville | 412 | +1 412 |
| Monroeville | 724 | +1 724 |
| Monroeville | 878 | +1 878 |
| Mount Lebanon | 412 | +1 412 |
| Mount Lebanon | 878 | +1 878 |
| New Castle | 724 | +1 724 |
| New Castle | 878 | +1 878 |
| Norristown | 484 | +1 484 |
| Norristown | 610 | +1 610 |
| Penn Hills | 412 | +1 412 |
| Penn Hills | 878 | +1 878 |
| Philadelphia | 215 | +1 215 |
| Philadelphia | 267 | +1 267 |
| Pittsburgh | 412 | +1 412 |
| Pittsburgh | 878 | +1 878 |
| Plum | 412 | +1 412 |
| Plum | 724 | +1 724 |
| Plum | 878 | +1 878 |
| Pottstown | 484 | +1 484 |
| Pottstown | 610 | +1 610 |
| Radnor | 484 | +1 484 |
| Radnor | 610 | +1 610 |
| Reading | 484 | +1 484 |
| Reading | 610 | +1 610 |
| Scranton | 272 | +1 272 |
| Scranton | 570 | +1 570 |
| Springfield | 484 | +1 484 |
| Springfield | 610 | +1 610 |
| State College | 814 | +1 814 |
| Upper Saint Clair | 412 | +1 412 |
| Upper Saint Clair | 724 | +1 724 |
| Upper Saint Clair | 878 | +1 878 |
| West Chester | 484 | +1 484 |
| West Chester | 610 | +1 610 |
| West Mifflin | 412 | +1 412 |
| West Mifflin | 878 | +1 878 |
| Wilkes-Barre | 272 | +1 272 |
| Wilkes-Barre | 570 | +1 570 |
| Williamsport | 272 | +1 272 |
| Williamsport | 570 | +1 570 |
| York | 717 | +1 717 |