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US area code · Pennsylvania

878 area code

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.

Number holders in area code 878

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 204 prefixes are in use in 878, shared by 38 companies. The largest holders:

CompanyPrefixesShare
Onvoy, LLC5125%
Ton80 Communications, LLC199%
Onvoy Spectrum, LLC147%
Aerial Communications, Inc.147%
Fractel, LLC115%
Multiple Ocn Listing105%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 878 numbers

Reports to the FTC, last 30 days
147
Recorded messages or robocalls
65%
Rank among area codes
#356 of 670
Most reported subjects
Other (59)
Reducing your debt (credit cards, mortgage, student loans) (43)
Calls pretending to be government, businesses, or family and friends (18)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

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

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