| General Information about Area Code 878 | |
|---|---|
| Country | United States |
| State / Province / Territory | Pennsylvania |
| Major City | Pittsburgh |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 878-218 | Washington | Washington | Wireless |
| 878-258 | Freeport | Armstrong | Landline |
| 878-422 | Freeport | Armstrong | Landline |
| 878-332 | Wexford | Allegheny | Landline |
| 878-202 | Hermitage | Mercer | Landline |
| 878-777 | Derry | Westmoreland | Landline |
| 878-444 | Homer City | Indiana | Landline |
| 878-295 | Greensburg | Westmoreland | Wireless |
| 878-208 | - | - | - |
| 878-302 | Pittsburgh | Allegheny | Landline |
| 878-222 | New Castle | Lawrence | Landline |
| 878-888 | Clarksburg | Indiana | Landline |
| 878-228 | Uniontown | Fayette | Landline |
| 878-271 | Butler | Butler | Landline |
| 878-201 | Rochester | Beaver | Landline |
| 878-204 | Clarks Mills | Mercer | Landline |
| 878-266 | Rural Valley | Armstrong | Landline |
| 878-203 | Charleroi | Washington | Landline |
| 878-333 | Ellwood City | Lawrence | Landline |
| 878-999 | - | - | - |