These numbers are usually found in Pennsylvania
878-201 → Rochester, PA
878-202 → Sharon, PA
878-203 → Charleroi, PA
878-204 → Hadley, PA
878-205 → Connellsville, PA
878-206 → Fairchance, PA
878-207 → Rochester, PA
878-208 → Cranberry Township, PA
878-210 → Joffre, PA
878-218 → Washington, PA
878-222 → New Castle, PA
878-228 → Uniontown, PA
878-238 → Ligonier, PA
878-258 → Freeport, PA
878-266 → Shelocta, PA
878-271 → Butler, PA
878-295 → Greensburg, PA
878-302 → Pittsburgh, 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 → Freeport, 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 → Springdale, PA
878-870 → Farmington, PA
878-888 → Aultman, PA
878-900 → Enon Valley, PA
878-999 → Pittsburgh, PA