Area code 878

Where area code 878 is

878 is one of 15 geographic area codes serving Pennsylvania; NANPA records its in-service date as August 17, 2001. It is an overlay: 878 and 412 and 724 cover the same territory, so neighbors on the same street can have different area codes. It is in the Eastern time zone. The places with the most assigned exchanges include Beaver Falls, Washington, Rochester, Greensburg, and Uniontown. By population, its largest named places are Derry, New Castle, Butler, Washington, and Greensburg.

Places served by 878

878 holds 2.3% of the 8,256 central office codes assigned in Pennsylvania, the 12th most of the state's 15 codes. 73 Census places could be matched to rate centers with 878 exchanges; the most populous are Derry (25,181), New Castle (21,332), Butler (16,953), and Washington (15,411). Each place page lists the exact prefixes and carriers for that town.

Ten-digit and seven-digit dialing in 878

According to NANPA's dialing-plan data, local calls within 878 are dialed as ten digits (area code plus number) and toll calls as ten digits (area code plus number). Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number. NANPA's dialing-plan note for this code reads: "All calls within and between NPAs 412 and 724 and 878 can be dialed as 10D or 1+10D. Calls to other NPAs must be dialed as 1+10D."

Who holds 878 exchanges

36 carriers hold the 190 central office codes assigned in 878. Onvoy, LLC - Pa has the most, with 51 (27%). 190 of the codes (100%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Rate centers and towns in 878

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 878 has codes in 104 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

878 code assignments over time

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 190 are assigned in 878, 24% of 800. 131 were assigned in 2020 or later.

A local 878 number on Callata

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

Porting a number you already use in area code 878 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.