Interchange Listings for Area Code 878
| AreaCode/Prefix |
City |
| 878-201 | Rochester, PA |
| 878-202 | Sharon, PA |
| 878-203 | Charleroi, PA |
| 878-204 | Sheakleyville, PA |
| 878-205 | Connellsville, PA |
| 878-206 | Fairchance, PA |
| 878-207 | Rochester, PA |
| 878-210 | Midway, PA |
| 878-218 | Washington, PA |
| 878-222 | New Wilmington, PA |
| 878-228 | Uniontown, PA |
| 878-238 | Ligonier, PA |
| 878-258 | Freeport, PA |
| 878-266 | Elderton, PA |
| 878-271 | Butler, PA |
| 878-295 | Greensburg, PA |
| 878-302 | New Kensington, PA |
| 878-313 | Rochester, PA |
| 878-332 | Wexford, PA |
| 878-333 | Ellwood City, PA |
| 878-355 | Uniontown, PA |
| 878-378 | West Newton, PA |
| 878-379 | Waynesburg, PA |
| 878-400 | Wampum, PA |
| 878-422 | Kittanning, PA |
| 878-425 | Saxonburg, PA |
| 878-444 | Homer City, PA |
| 878-645 | Greensburg, PA |
| 878-666 | Marion Center, PA |
| 878-668 | Enon Valley, PA |
| 878-670 | Pittsburgh, PA |
| 878-777 | Derry, PA |
| 878-847 | New Kensington, PA |
| 878-870 | Farmington, PA |
| 878-999 | Pittsburgh, PA |