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878 Area Code

Area code 878 serves Pittsburgh, Penn Hills, Mount Lebanon, Monroeville, Plum and nearby communities in Pennsylvania. It has been in service since August 17, 2001, when it was split from 412.

StatePennsylvania
Time zoneEastern
Local time now…
Prefixes in use191
Overlay with412, 878, 724
Projected to run out2072
PittsburghPenn HillsMount LebanonMonroevillePlumAllison ParkNew CastleMurrysvilleBaldwinHermitageFranklin ParkIndianaWhitehallGreensburgCarnot-MoonWilkinsburgWashingtonButlerSharonJefferson HillsNew KensingtonLower BurrellMunhallBrentwoodUniontownGlenshawEconomyAliquippaBeaver FallsJeannettePleasant HillsSwissvaleCastle ShannonBellevueDormontEllwood CityAmbridgeMonessenHomeacre-LyndoraOakmontConnellsvilleWest ViewForest HillsClairtonCraftonMcKees RocksNew BrightonMonacaGreenvilleCoraopolisShanor-NorthvueFox ChapelPittsburghAllison ParkNew CastleHermitage
Cities and towns served by area code 878

Who issues 878 numbers

Mobile 7%VoIP and cable 54%Landline 38%

Share of the 191 prefixes (the three digits after 878) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Onvoy (Sinch)65
Ton80 Communications19
Aerial Communications14
Fractel11
Comcast (Xfinity)7
Verizon Business (MCImetro)7
Verizon Wireless7
Commio7

Cities and towns in area code 878

CityPopulationOther area codes
Pittsburgh307,632412
Penn Hills39,452724
Mount Lebanon32,552412
Monroeville27,685724
Plum26,225724
Allison Park22,108724
New Castle21,175724
Murrysville20,636724
Baldwin20,516412
Hermitage16,308724
Franklin Park14,978724
Indiana14,697724
Whitehall14,521412
Greensburg14,462724
Carnot-Moon13,639724
Wilkinsburg13,602412
Washington13,377724
Butler12,879724
Sharon12,648724
Jefferson Hills12,357412
New Kensington11,759724
Lower Burrell11,470724
Munhall10,253412
Brentwood9,597412
Uniontown9,434724
Glenshaw9,194724
Economy9,098724
Aliquippa9,002724
Beaver Falls8,832724
Jeannette8,489724
Pleasant Hills8,212412
Swissvale8,197412
Castle Shannon8,006412
Bellevue7,888412
Dormont7,816412
Ellwood City7,362724
Ambridge6,944724
Monessen6,657724
Homeacre-Lyndora6,647724
Oakmont6,576724

Showing the 40 largest of 52 places with 5,000+ residents.

Got a call from 878?

A 878 number was originally issued in Pennsylvania, but that does not prove the caller is there. 54% of 878 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 191 prefixes in area code 878

Format: (878) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 878

Where is area code 878?
Area code 878 is in Pennsylvania. It covers Pittsburgh, Penn Hills, Mount Lebanon, Monroeville, Plum, Allison Park and 46 more cities and towns.
What time zone is area code 878?
Area code 878 is in the Eastern time zone.
Is 878 a toll-free number?
No. 878 is a geographic area code in Pennsylvania. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 878 share its area with 412 and 878, 724?
412, 878 and 878, 724 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 878 run out of numbers?
NANPA's latest forecast projects the 724/878 overlay to exhaust in the second quarter of 2072. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Pennsylvania