Area codes · +1
Area code 878
Area code 878 is centred on Pittsburgh. We hold 1,658 allocated blocks for it across 104 rate centres, split 34% mobile, 28% landline and 39% VoIP.
The other area codes laid over 878
Area code 878 does not have Pittsburgh to itself. 1 other code — 412 — serves the same rate centres, laid over the same ground rather than dividing it. That is an overlay: a new code added when the old one ran out of numbers, covering the same streets. Two neighbours can hold different area codes, so the code says roughly when a number was issued rather than where it sits.
4125,360 blocks, 32 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 878 number and a 412 number from the same street can report different line types. Filtering Pittsburgh by area code needs all 2 of them.
878 is not confined to Pittsburgh itself: its blocks sit across 104 rate centres, named in the table below.
Pennsylvania is split across 15 area codes — 267, 484, 724, 717, 570, 878 and others. By allocated blocks 878 is the 13th largest of them, holding 3% of the Pennsylvania total.
Where 878 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Beaver Fls and Ellwood Cy are shortened. Names are reproduced as recorded rather than expanded — the abbreviation is the key the block data is filed under.
| Rate centre | Blocks | Share of 878 |
|---|---|---|
| Pittsburgh | 99 | 6% |
| Beaver Fls | 89 | 5% |
| Washington | 87 | 5% |
| Rochester | 77 | 5% |
| Greensburg | 75 | 5% |
| Criderscor | 65 | 4% |
| Uniontown | 57 | 3% |
| Newknsngtn | 44 | 3% |
| Wexford | 37 | 2% |
| Ellwood Cy | 33 | 2% |
| Aliquippa | 32 | 2% |
| Butler | 32 | 2% |
| Indiana | 30 | 2% |
| Homer City | 23 | 1% |
| Farmington | 22 | 1% |
| Pittsburgh | 22 | 1% |
| Connellsvl | 21 | 1% |
| Sharpsvl | 21 | 1% |
| Newwlmngtn | 20 | 1% |
| Charleroi | 19 | 1% |
| New Castle | 19 | 1% |
| Westnewton | 19 | 1% |
| Export | 18 | 1% |
| Brownsvl | 17 | 1% |
80 further rate centres in 878 hold fewer blocks than these.
Carriers holding the most 878 blocks
Onvoy491 blocks
Onvoy Spectrum145 blocks
Verizon Wireless126 blocks
AT&T Wireless112 blocks
Ton80 Communications, Llc69 blocks
Aerial Communications, Inc.66 blocks
The largest holder, Onvoy, has 30% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 878 number still reports the carrier it started with. Closing that gap needs a live query against the routing database. How line type is derived.
Check a single 878 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 878?
Area code 878 covers Pittsburgh. It is not the only code there: 412 is an overlay on the same rate centres, so a Pittsburgh number can start with any of them.
Is a 878 number a mobile or a landline?
It can be either, and the digits do not say which. North American mobile and landline numbers share the same ranges, so the answer comes from the carrier holding the block. In 878 the split runs 34% mobile, 28% landline and 39% VoIP, so VoIP is the most likely single answer.
Which carriers hold 878 numbers?
The largest holders are Onvoy, Onvoy Spectrum, Verizon Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 878 numbers are there?
The code holds 1,658 allocated blocks in our copy of the numbering plan. A block is 1,000 or 10,000 consecutive numbers depending on how deeply it has been pooled, so 878 covers on the order of 1,658,000 possible numbers — most of which have never been issued to anyone.