878 area code
Area code 878 is in Pennsylvania. It covers Pittsburgh, Cranberry Township, Monroeville and 366 other places: 339 ZIP codes in Allegheny, Westmoreland, Butler and 11 other counties. Local time there is , Eastern Time. In service since 2001 as an overlay: it covers the same area as 412 and 724, so a number from there can have any of them.
- State
- Pennsylvania
- Time zone
- Eastern
- Largest city
- Pittsburgh
- In service since
- 2001
- Rate centres
- 104
- Prefixes assigned
- 191 (1,910,000 numbers)
Who calls from a 878 number
NANPA records the carrier each block of 878 numbers is assigned to. Of the 1.4 million 878 numbers assigned, 73% are with cable, internet-calling, business and other carriers (Onvoy, Ton80 Communications and Commio); 25% with mobile carriers (Verizon Wireless, AT&T Mobility and T-Mobile); 2% with local phone companies.
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Onvoy | Cable, VoIP, other | 40% |
| Verizon Wireless | Mobile | 8% |
| AT&T Mobility | Mobile | 8% |
| T-Mobile | Mobile | 8% |
| Ton80 Communications | Cable, VoIP, other | 3% |
| Commio | Cable, VoIP, other | 3% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 878
The 85 places with a telephone rate centre of their own using 878, largest first. Each links to its ZIP codes.
Nearby places using 878
These places have no rate centre of their own in NANPA's records; the nearest one uses 878. Near an area-code boundary that can be wrong for part of a town.
- Cranberry Township
- Monroeville
- Mc Kees Rocks
- Allison Park
- Baldwin
- West Mifflin
- Hermitage
- Franklin Park
- Wilkinsburg
- Carnot-Moon
- Jefferson Hills
- Lower Burrell
- South Park
- Munhall
- North Versailles
- Brentwood
- Glenshaw
- Economy
- Sarver
- Swissvale
- Pleasant Hills
- Castle Shannon
- Bellevue
- Dormont
- Homeacre-Lyndora
- Oakmont
- West View
- Forest Hills
- Crafton
- McKees Rocks
- New Brighton
- Monaca
- Coraopolis
- Fox Chapel
- Duquesne
- Shanor-Northvue
- Turtle Creek
- Arnold
- Avalon
- Level Green
- McGovern
- Beaver
- Glassport
- North Braddock
- Farrell
- Cabot
- Sewickley
- Port Vue
- Manor
- Etna
- Ohioville
- Mount Oliver
- Ingram
- Millvale
- Centerville
- Trafford
- Brackenridge
- Sharpsburg
- Churchill
- Edgewood
ZIP codes in area code 878
339 ZIP codes in 250 towns, by the town each is mailed to, largest first. Each links to its own page.
- Pittsburgh
- 15201, 15202, 15203, 15204, 15205, 15206, 15207, 15208, 15209, 15210, 15211, 15212, 15213, 15214, 15215, 15216, 15217, 15218, 15219, 15220, 15221, 15222, 15223, 15224, 15225, 15226, 15227, 15228, 15229, 15230, 15231, 15232, 15233, 15234, 15235, 15236, 15237, 15238, 15239, 15240, 15241, 15242, 15243, 15244, 15250, 15251, 15252, 15253, 15254, 15255, 15257, 15258, 15259, 15260, 15261, 15262, 15264, 15265, 15267, 15268, 15270, 15272, 15274, 15275, 15276, 15277, 15278, 15279, 15281, 15282, 15283, 15286, 15289, 15290, 15295
Where 878 numbers are issued
NANPA's rate centres with the most 878 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
BEAVER FLS | Beaver Falls | 9 |
PTTSBGZON1 | Pittsburgh | 9 |
WASHINGTON | Washington | 8 |
GREENSBURG | Greensburg | 7 |
ROCHESTER | Rochester | 7 |
CRIDERSCOR | — | 6 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Allegheny County (118)
- Westmoreland County (46)
- Butler County (17)
- Beaver County (16)
- Washington County (24)
- Fayette County (45)
- Lawrence County (17)
- Mercer County (11)
- Indiana County (26)
- Armstrong County (14)
- Greene County (1)
- Venango County (1)
- Clarion County (2)
- Franklin County (1)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 878
Where is area code 878?
Area code 878 is in Pennsylvania. It covers Pittsburgh, Cranberry Township, Monroeville and 366 other places: 339 ZIP codes in Allegheny, Westmoreland, Butler and 11 other counties.
What ZIP codes are in area code 878?
339 ZIP codes, by the town each is mailed to: Pittsburgh (75, 15201 to 15295), Cranberry Township (16066), Monroeville (15146), Wexford (15090) and 246 more towns. The full list is on this page.
What time zone is area code 878 in?
Eastern time.
Is a 878 number a mobile or a landline?
It can be either. 25% of 878 numbers are assigned to mobile carriers and 2% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
What area codes overlay 878?
412 and 724. They cover the same area as 878, so a new number there can be given any of them.
Does a 878 number mean the caller is in Pennsylvania?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 878 call can come from anywhere.
Other area codes in Pennsylvania
- 215 Philadelphia
- 223 Harrisburg
- 267 Philadelphia
- 272 Scranton
- 412 Pittsburgh
- 445 Philadelphia
- 484 Reading
- 570 Scranton
- 582 Erie
- 610 Reading
- 717 Harrisburg
- 724 Greensburg
- 814 Erie
- 835 Reading
All 15 Pennsylvania area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 878.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/878
Underlying data is public domain or openly licensed — sources, vintages and licences.