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US area code · Pennsylvania

Area code 878

Where the 878 area code is, its overlay and how to dial a +1 878 number from anywhere.

CoversBethel Park, PennsylvaniaTime zoneEastern (ET)TypeOverlay
Quick answer

The 878 area code is in Bethel Park, Pennsylvania, United States (Eastern (ET)). To call from abroad: +1 878 555-0123. It is an overlay, so all 10 digits are dialled.

StatePennsylvania
Main areaBethel Park
Time zoneEastern (ET)
TypeOverlay
10-digit dialingRequired
In service since15-Dec-1999

The 878 area code is a geographic North American Numbering Plan (NANP) code covering Bethel Park, Pennsylvania. It has been in service since 15-Dec-1999 and sits in the Eastern (ET) time zone.

Overlay 878 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

878412724

How to dial a 878 number

From abroad+1 878 555-0123
Within the US / Canada1 878 555-0123
Locally (same area)878 555-0123

Cities in the 878 area code

A 878 number is usually in one of these places in Pennsylvania — 2 counties.

Bethel Park AlleghenyMcKeesport AlleghenyMonroeville AlleghenyMount LebanonNew Castle LawrencePenn HillsPittsburgh AlleghenyPlumUpper Saint ClairWest Mifflin Allegheny

Other Pennsylvania area codes

215223267272412445484570582610717724814835

Frequently asked questions

Where is the 878 area code?

The 878 area code is in Bethel Park, Pennsylvania, United States (Eastern (ET)).

Is 878 an overlay area code?

Yes. 878 overlays the same region as 412, 724, so callers dial all 10 digits.

Do I have to dial 10 digits for 878?

Yes — dial the area code plus the seven-digit number.

How do I call a 878 number from another country?

Dial your exit code (or +), then 1, then 878, then the number: +1 878 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 878 number does not pinpoint a street or ZIP code.

Missed a call from +1 878?

In the 30 days to September 24, 2026, 147 unwanted calls showing a 878 number were reported to the US Federal Trade Commission, 65% of them recorded messages or robocalls. That puts 878 at #356 of 670 area codes reported.

Other59
Reducing your debt (credit cards, mortgage, student loans)43
Calls pretending to be government, businesses, or family and friends18
Dropped call or no message11
Before you call back
  • If you do not know anyone in Pennsylvania, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 878 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 878 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 878:

Onvoy, LLC 51Ton80 Communications, LLC 19Onvoy Spectrum, LLC 14Aerial Communications, Inc. 14Fractel, LLC 11Multiple Ocn Listing 10

About 6.9% of the 204 prefixes in use belong to mobile carriers: a 878 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 878 — cities & rate centres