Area code 878 – Pennsylvania
878 has served Pennsylvania since 2001, split from 412. It is still largely empty: 191 of 786 number blocks allocated. Other CLEC / VoIP is the largest holder with 38.2% of blocks, ahead of Onvoy / Inteliquent at 26.7%. It shares its geography with overlay codes 412, 724, so local calls take all ten digits. Spam complaints are comparatively rare: 185 in the 33 days to 30 October 2026, 351st of the 422 codes with five or more complaints.
- State
- Pennsylvania
- In service since
- 2001
- Time zone
- Eastern
Who holds 878 number blocks
Share of the 191 assigned NXX blocks (24.3% of the 786 possible), across 36 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP27.2%
- Onvoy26.7%
- T-Mobile7.9%
- Charter7.9%
- Verizon7.3%
- AT&T4.2%
- Comcast3.7%
- Bandwidth3.1%
- Lumen3.1%
- Dish2.6%
- Windstream2.6%
- Peerless1%
- Telnyx1%
- Vonage0.5%
- Consolidated0.5%
- Twilio0.5%
Spam complaints naming 878
FTC Do Not Call complaints where the caller ID was a 878 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.
Rate centers in 878
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 104.
Timeline
- 2001 878 goes into service, split from or overlaid on 412.
More about 878
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 878
What state is area code 878?
Pennsylvania. It covers the same area as 412/878, 724/878.
Is a call from 878 a scam?
Not by itself. 878 drew 185 FTC complaints in the 33 days to 30 October 2026, 351st of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.
Which carrier owns 878 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 38.2%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 878?
Yes – ten digits for local calls in 878, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.