Area code 878 prefixes
191 of the 786 possible NXX blocks are assigned in area code 878 (24.3% of capacity), spread across 104 rate centers and 36 holders. The largest holders are ONVOY, LLC - PA (51 blocks, 26.7%), TON80 COMMUNICATIONS, LLC (19 blocks, 9.9%), AERIAL COMMUNICATIONS, INC. (14 blocks, 7.3%). Grouped by brand, Onvoy accounts for 51 blocks; brand-attributable holders cover 73% of the code, and the rest are CLECs, VoIP wholesalers and regional carriers that trade under their own names. The assignment records here run from 2013-04-17 to 2026-10-09, with 36 blocks handed out in 2023 alone. 191 blocks (100%) are in thousands-block pooling, meaning the block is shared between carriers in 1,000-number lots rather than held whole – which is why a single NXX can serve several carriers at once. 1 assigned block (312) is not yet in service: assigned to a carrier but not open for calls, so a caller ID from one is spoofed. 83 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
Largest holders in 878
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| ONVOY, LLC - PA | Onvoy | 51 | 26.7% |
| TON80 COMMUNICATIONS, LLC | – | 19 | 9.9% |
| AERIAL COMMUNICATIONS, INC. | T-Mobile | 14 | 7.3% |
| ONVOY SPECTRUM, LLC | Charter | 14 | 7.3% |
| FRACTEL, LLC | – | 11 | 5.8% |
| COMCAST IP PHONE, LLC | Comcast | 7 | 3.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 7 | 3.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | Verizon | 7 | 3.7% |
| COMMIO, LLC | – | 7 | 3.7% |
| BANDWIDTH.COM CLEC, LLC - PA | Bandwidth | 6 | 3.1% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 6 | 3.1% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 5 | 2.6% |
Names are printed as they appear in the assignment records, which is the legal entity rather than the brand. Holding a block is not the same as serving the numbers in it: portability moves numbers between carriers and pooling splits a block between several.
Rate centers with their own page
Rate centers where at least three blocks are assigned, excluding the numbered metro zone codes. The remainder are in the full table below.
All 191 assigned blocks
One row per NXX. “Pooled” means carriers draw 1,000-number lots from the block rather than holding all 10,000, so a pooled prefix can belong to several carriers at once. “Not in service” means assigned but not yet open for calls – a caller ID from one of those is necessarily spoofed. The holder column gives the brand where the legal entity maps to one; the full legal names are in the holders table above, exactly as NANPA records them.
| Prefix | Holder of record | Rate center | Assigned | Pooled | In service |
|---|---|---|---|---|---|
| 878-200 | Dish | SCOTTDALE | 2023-05-26 | yes | yes |
| 878-201 | Peerless | ROCHESTER | 2013-04-17 | yes | yes |
| 878-202 | Charter | SHARON | 2013-05-31 | yes | yes |
| 878-203 | Lumen | CHARLEROI | 2015-05-21 | yes | yes |
| 878-204 | Windstream | SHEAKLEYVL | 2015-04-22 | yes | yes |
| 878-205 | Onvoy | CONNELLSVL | 2016-01-08 | yes | yes |
| 878-206 | Onvoy | FAIRCHANCE | 2016-03-21 | yes | yes |
| 878-207 | Comcast | ROCHESTER | – | yes | yes |
| 878-208 | Verizon | CRIDERSCOR | 2015-08-11 | yes | yes |
| 878-209 | Dish | ALIQUIPPA | 2023-05-26 | yes | yes |
| 878-210 | Windstream | MIDWAY | 2017-05-23 | yes | yes |
| 878-212 | Verizon | WASHINGTON | 2017-11-30 | yes | yes |
| 878-213 | Bandwidth | PTTSBGZON1 | 2018-12-04 | yes | yes |
| 878-214 | IDT AMERICA, CORP. - PA | GREENSBURG | 2017-12-01 | yes | yes |
| 878-215 | Dish | INDIANA | 2023-05-31 | yes | yes |
| 878-216 | Onvoy | REPUBLIC | 2018-08-22 | yes | yes |
| 878-217 | Lumen | CRIDERSCOR | 2018-12-07 | yes | yes |
| 878-218 | Verizon | WASHINGTON | 2015-02-12 | yes | yes |
| 878-219 | Comcast | FARMINGTON | 2019-02-19 | yes | yes |
| 878-220 | Verizon | EXPORT | 2018-01-16 | yes | yes |
| 878-221 | T-Mobile | BUTLER | 2017-12-14 | yes | yes |
| 878-222 | Onvoy | NEWWLMNGTN | – | yes | yes |
| 878-223 | CSC WIRELESS, LLC | UNIONTOWN | 2019-11-08 | yes | yes |
| 878-224 | AT&T | FORD CITY | 2020-01-17 | yes | yes |
| 878-225 | Onvoy | ELLWOOD CY | 2018-12-10 | yes | yes |
| 878-226 | Onvoy | WASHINGTON | 2021-01-28 | yes | yes |
| 878-227 | T-Mobile | BEAVER FLS | 2020-09-14 | yes | yes |
| 878-228 | Lumen | UNIONTOWN | – | yes | yes |
| 878-229 | Verizon | WASHINGTON | 2020-02-05 | yes | yes |
| 878-230 | HD CARRIER LLC | PTTSBGZON4 | 2021-04-27 | yes | yes |
| 878-231 | Onvoy | WEXFORD | 2020-06-16 | yes | yes |
| 878-232 | Onvoy | ELLWOOD CY | 2021-01-28 | yes | yes |
| 878-233 | Bandwidth | PRINCETON | 2021-01-28 | yes | yes |
| 878-234 | T-Mobile | PTGSBNZN23 | 2023-08-04 | yes | yes |
| 878-235 | Telnyx | ROCHESTER | 2021-02-04 | yes | yes |
| 878-236 | T-Mobile | CRIDERSCOR | 2021-04-15 | yes | yes |
| 878-237 | STRATUS NETWORKS | BEAVER FLS | 2021-05-26 | yes | yes |
| 878-238 | LAUREL HIGHLAND TELEPHONE COMPANY - PA | LIGONIER | 2016-02-11 | yes | yes |
| 878-239 | Comcast | ZELIENOPLE | 2021-10-25 | yes | yes |
| 878-240 | Vonage | CONNELLSVL | 2021-06-10 | yes | yes |
| 878-241 | Bandwidth | SMITHSFRRY | 2021-07-21 | yes | yes |
| 878-242 | Bandwidth | NEW CASTLE | 2021-10-11 | yes | yes |
| 878-243 | Telnyx | WASHINGTON | 2021-02-05 | yes | yes |
| 878-244 | T-Mobile | SLIPPERYRK | 2021-05-13 | yes | yes |
| 878-245 | T-Mobile | BEAVER FLS | 2021-12-14 | yes | yes |
| 878-246 | Comcast | CLAYSVILLE | 2021-11-05 | yes | yes |
| 878-247 | T-Mobile | BELLEVRNON | 2021-12-14 | yes | yes |
| 878-248 | Windstream | GIBSONIA | 2022-02-22 | yes | yes |
| 878-249 | T-Mobile | LEECHBURG | 2021-12-15 | yes | yes |
| 878-250 | AT&T | CRIDERSCOR | 2022-04-14 | yes | yes |
| 878-251 | Onvoy | BLACK LICK | 2020-07-27 | yes | yes |
| 878-252 | TON80 COMMUNICATIONS, LLC | CRIDERSCOR | 2021-04-13 | yes | yes |
| 878-253 | TON80 COMMUNICATIONS, LLC | MONESSEN | 2022-01-08 | yes | yes |
| 878-254 | Verizon | PTTSBGZON1 | 2022-07-25 | yes | yes |
| 878-255 | Charter | ALIQUIPPA | 2021-04-22 | yes | yes |
| 878-256 | AT&T | PTTSBGZON1 | 2022-05-18 | yes | yes |
| 878-257 | Onvoy | TAYLORSTN | 2018-12-10 | yes | yes |
| 878-258 | SALSGIVER TELECOM, INC. - PA | FREEPORT | 2014-04-01 | yes | yes |
| 878-259 | COMMIO, LLC | EXPORT | 2021-10-01 | yes | yes |
| 878-260 | Comcast | CURTISVL | 2022-06-07 | yes | yes |
| 878-261 | Lumen | FREEPORT | 2022-08-08 | yes | yes |
| 878-262 | Onvoy | MARS | 2022-09-02 | yes | yes |
| 878-263 | AT&T | SHARPSVL | 2022-11-03 | yes | yes |
| 878-264 | T-Mobile | BEAVER FLS | 2023-01-05 | yes | yes |
| 878-265 | Bandwidth | CALIFORNIA | 2022-02-11 | yes | yes |
| 878-266 | Windstream | ELDERTON | 2015-06-29 | yes | yes |
| 878-267 | AT&T | WEXFORD | 2023-09-01 | yes | yes |
| 878-268 | AT&T | IMPERIAL | 2022-05-06 | yes | yes |
| 878-269 | Onvoy | PARKWOOD | – | yes | yes |
| 878-270 | Consolidated | CRIDERSCOR | 2024-07-23 | yes | yes |
| 878-271 | Lumen | BUTLER | 2014-11-07 | yes | yes |
| 878-272 | Comcast | SPRINGDALE | 2023-05-03 | yes | yes |
| 878-273 | Comcast | HOMER CITY | 2023-05-03 | yes | yes |
| 878-274 | Verizon | SLIPPERYRK | 2023-05-08 | yes | yes |
| 878-275 | COMMIO, LLC | AVONMORE | 2023-09-01 | yes | yes |
| 878-276 | COMMIO, LLC | BLACK LICK | 2023-09-01 | yes | yes |
| 878-277 | Onvoy | BLAIRSVL | 2021-04-22 | yes | yes |
| 878-278 | Onvoy | DARLINGTON | 2020-10-01 | yes | yes |
| 878-279 | COMMIO, LLC | DAWSON | 2023-09-01 | yes | yes |
| 878-280 | COMMIO, LLC | FAYETTE CY | 2023-09-01 | yes | yes |
| 878-281 | Onvoy | FINLEYVL | 2023-09-12 | yes | yes |
| 878-282 | Onvoy | REPUBLIC | 2023-09-12 | yes | yes |
| 878-283 | Onvoy | UNIONTOWN | 2023-09-12 | yes | yes |
| 878-284 | Onvoy | ROCHESTER | 2023-09-12 | yes | yes |
| 878-285 | STRATUS NETWORKS | MTPLEASANT | 2021-03-18 | yes | yes |
| 878-286 | Onvoy | JEANNETTE | 2023-09-12 | yes | yes |
| 878-287 | Onvoy | EVANS CITY | 2023-09-12 | yes | yes |
| 878-288 | TON80 COMMUNICATIONS, LLC | BOLIVAR | – | yes | yes |
| 878-289 | T-Mobile | BEAVER FLS | 2023-09-25 | yes | yes |
| 878-290 | T-Mobile | PTTSBGZON7 | 2023-09-25 | yes | yes |
| 878-291 | ADVANCED TELEPHONE SYS INC DBA HTC COMMUNICATIONS | TAYLORSTN | 2023-10-26 | yes | yes |
| 878-292 | Dish | GREENVILLE | 2023-12-08 | yes | yes |
| 878-293 | T-Mobile | BEAVER FLS | 2024-01-12 | yes | yes |
| 878-294 | AT&T | RURAL VLY | 2025-02-28 | yes | yes |
| 878-295 | T-Mobile | GREENSBURG | 2014-04-01 | yes | yes |
| 878-296 | T-Mobile | BEAVER FLS | 2025-09-30 | yes | yes |
| 878-297 | AT&T | WASHINGTON | 2025-10-01 | yes | yes |
| 878-298 | Onvoy | GREENSBURG | 2025-11-20 | yes | yes |
| 878-299 | Onvoy | INDIANA | 2025-11-20 | yes | yes |
| 878-300 | Dish | NEW CASTLE | 2021-12-10 | yes | yes |
| 878-301 | Charter | SMOCK | 2023-08-03 | yes | yes |
| 878-302 | Peerless | NEWKNSNGTN | 2013-04-17 | yes | yes |
| 878-303 | Onvoy | BEAVER FLS | 2026-01-05 | yes | yes |
| 878-305 | Onvoy | ALIQUIPPA | 2026-02-26 | yes | yes |
| 878-306 | Onvoy | UNIONTOWN | 2026-03-18 | yes | yes |
| 878-307 | Onvoy | ROCHESTER | 2026-04-14 | yes | yes |
| 878-309 | Bandwidth | GREENSBURG | 2018-09-25 | yes | yes |
| 878-312 | Verizon | WAYNESBURG | 2026-10-09 | yes | no |
| 878-313 | Verizon | ROCHESTER | 2015-01-09 | yes | yes |
| 878-322 | TON80 COMMUNICATIONS, LLC | DONORA | 2021-06-09 | yes | yes |
| 878-329 | Charter | SMITHFIELD | 2023-08-03 | yes | yes |
| 878-332 | Lumen | WEXFORD | 2014-01-28 | yes | yes |
| 878-333 | Onvoy | ELLWOOD CY | – | yes | yes |
| 878-335 | TON80 COMMUNICATIONS, LLC | LOWELLVL | 2022-02-24 | yes | yes |
| 878-336 | FRACTEL, LLC | PTTSBGZON6 | 2021-10-25 | yes | yes |
| 878-345 | FRACTEL, LLC | PTGSBNZN20 | 2021-07-22 | yes | yes |
| 878-348 | FRACTEL, LLC | BEAVER FLS | 2020-05-27 | yes | yes |
| 878-355 | T-Mobile | UNIONTOWN | 2017-06-02 | yes | yes |
| 878-356 | FRACTEL, LLC | WESTNEWTON | 2021-08-18 | yes | yes |
| 878-377 | FRACTEL, LLC | SHARPSVL | 2020-05-27 | yes | yes |
| 878-378 | Onvoy | WESTNEWTON | 2016-03-24 | yes | yes |
| 878-379 | Verizon | WAYNESBURG | 2017-04-26 | yes | yes |
| 878-400 | Onvoy | WAMPUM | – | yes | yes |
| 878-422 | SALSGIVER TELECOM, INC. - PA | KITTANNING | 2014-04-01 | yes | yes |
| 878-425 | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | SAXONBURG | 2016-02-03 | yes | yes |
| 878-433 | TON80 COMMUNICATIONS, LLC | CLAIRTON | 2022-01-08 | yes | yes |
| 878-439 | Verizon | ROCHESTER | 2017-09-28 | yes | yes |
| 878-444 | Onvoy | HOMER CITY | – | yes | yes |
| 878-465 | FRACTEL, LLC | WEXFORD | 2021-10-25 | yes | yes |
| 878-477 | Onvoy | CHARLEROI | 2021-04-22 | yes | yes |
| 878-489 | Charter | HARRISONCY | 2023-08-03 | yes | yes |
| 878-500 | FRACTEL, LLC | FORD CITY | – | yes | yes |
| 878-522 | Charter | YOUNGWOOD | 2023-08-03 | yes | yes |
| 878-529 | FRACTEL, LLC | BROWNSVL | 2021-09-08 | yes | yes |
| 878-545 | Verizon | WASHINGTON | 2026-05-14 | yes | yes |
| 878-553 | Verizon | PTTSBGZON1 | 2022-07-21 | yes | yes |
| 878-587 | Charter | ENONVALLEY | 2023-08-03 | yes | yes |
| 878-598 | TON80 COMMUNICATIONS, LLC | AMBRIDGE | 2021-04-12 | yes | yes |
| 878-599 | TON80 COMMUNICATIONS, LLC | PTGSBNZN14 | 2021-04-14 | yes | yes |
| 878-600 | TERRA NOVA TELECOM INC. | PTTSBGZON1 | 2019-03-27 | yes | yes |
| 878-626 | TON80 COMMUNICATIONS, LLC | PTTSBGZON7 | 2022-01-10 | yes | yes |
| 878-645 | Verizon | GREENSBURG | 2016-01-15 | yes | yes |
| 878-666 | Onvoy | MARION CTR | – | yes | yes |
| 878-668 | Windstream | ENONVALLEY | 2015-04-22 | yes | yes |
| 878-670 | COMMIO, LLC | PTTSBGZON1 | 2017-05-09 | yes | yes |
| 878-673 | TON80 COMMUNICATIONS, LLC | DERRY | 2022-02-14 | yes | yes |
| 878-677 | FRACTEL, LLC | NEWWLMNGTN | 2020-05-27 | yes | yes |
| 878-678 | CORE COMMUNICATIONS, INC. - PA | BADEN | 2020-03-26 | yes | yes |
| 878-688 | FRACTEL, LLC | HOMER CITY | 2020-05-27 | yes | yes |
| 878-707 | Charter | MARION CTR | 2023-08-01 | yes | yes |
| 878-723 | TON80 COMMUNICATIONS, LLC | PTTSBGZON3 | 2022-01-10 | yes | yes |
| 878-728 | Onvoy | GIBSONIA | 2019-06-12 | yes | yes |
| 878-732 | TON80 COMMUNICATIONS, LLC | PTGSBNZN19 | 2022-01-20 | yes | yes |
| 878-736 | TON80 COMMUNICATIONS, LLC | MARCHAND | 2022-02-24 | yes | yes |
| 878-744 | Charter | MCLELANDTN | 2023-08-01 | yes | yes |
| 878-768 | Onvoy | VOLANT | 2020-02-11 | yes | yes |
| 878-777 | Onvoy | DERRY | – | yes | yes |
| 878-778 | Onvoy | BLACKTOWN | 2020-02-07 | yes | yes |
| 878-780 | Charter | CLYMER | 2023-08-01 | yes | yes |
| 878-782 | TON80 COMMUNICATIONS, LLC | HOOKSTOWN | 2022-02-24 | yes | yes |
| 878-783 | TON80 COMMUNICATIONS, LLC | AVONMORE | 2021-03-08 | yes | yes |
| 878-784 | TON80 COMMUNICATIONS, LLC | EPALESTINE | 2022-02-18 | yes | yes |
| 878-786 | TON80 COMMUNICATIONS, LLC | GREENSBURG | 2022-01-10 | yes | yes |
| 878-787 | FRACTEL, LLC | PTTSBGZON1 | 2019-01-28 | yes | yes |
| 878-788 | Onvoy | FOXBURG | 2020-02-07 | yes | yes |
| 878-789 | Onvoy | PETROLIA | 2020-02-07 | yes | yes |
| 878-800 | WIRETAP TELECOM, LLC. | PTGSBNZN15 | 2025-03-31 | yes | yes |
| 878-808 | Charter | FAIRCHANCE | 2023-08-01 | yes | yes |
| 878-822 | SKYE TELECOM LLC DBA SKYETEL | BUTLER | 2021-09-20 | yes | yes |
| 878-834 | TON80 COMMUNICATIONS, LLC | PTTSBGZON8 | 2022-01-10 | yes | yes |
| 878-837 | CORE COMMUNICATIONS, INC. - PA | BENTLEYVL | 2019-03-18 | yes | yes |
| 878-840 | Charter | NEW SALEM | 2023-08-01 | yes | yes |
| 878-844 | TON80 COMMUNICATIONS, LLC | INDIANA | 2021-04-16 | yes | yes |
| 878-847 | Onvoy | NEWKNSNGTN | 2016-03-24 | yes | yes |
| 878-867 | COMMIO, LLC | NEWKNSNGTN | 2022-09-14 | yes | yes |
| 878-868 | Charter | NEWFLORNCE | 2023-08-01 | yes | yes |
| 878-870 | Onvoy | FARMINGTON | 2016-03-24 | yes | yes |
| 878-877 | Onvoy | BUTLER | 2020-01-24 | yes | yes |
| 878-878 | Charter | NEWBEDFORD | 2023-08-01 | yes | yes |
| 878-879 | Onvoy | NEWKNSNGTN | 2019-08-19 | yes | yes |
| 878-880 | Onvoy | WASHINGTON | 2020-05-14 | yes | yes |
| 878-881 | Onvoy | BROWNSVL | 2020-07-23 | yes | yes |
| 878-884 | Onvoy | GREENSBURG | 2020-12-18 | yes | yes |
| 878-887 | Onvoy | PARIS | 2020-10-08 | yes | yes |
| 878-888 | Onvoy | PARKWOOD | – | yes | yes |
| 878-895 | Twilio | UNIONTOWN | 2020-11-18 | yes | yes |
| 878-898 | Onvoy | COOPERSTWN | 2022-11-03 | yes | yes |
| 878-900 | Onvoy | EPALESTINE | – | yes | yes |
| 878-978 | Onvoy | PTTSBGZON1 | 2021-07-22 | yes | yes |
| 878-988 | Charter | PT MARION | 2023-08-01 | yes | yes |
| 878-999 | Onvoy | PTTSBGZON1 | 2015-09-15 | yes | yes |
Frequently asked
How many prefixes does area code 878 have?
191 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 1,910 thousand-number ranges across 104 rate centers.
What do the first three digits after 878 tell me?
They identify the block, which tells you the rate center it was allocated to and the carrier that received it. They do not tell you who serves the number today: portability moves numbers between carriers, and pooling splits a block between several of them.
Is a 878 prefix tied to a specific town?
To a rate center, which is billing geography rather than a town. NANPA abbreviates rate center names to ten characters and in large metros uses zone codes, so the name is a NANPA label, not a place name.
What does “pooled” mean in the 878 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 191 of 878's blocks are pooled, which is how regulators slowed down area code exhaustion – and why one prefix can belong to several carriers.
Source and limits
NANPA CO Code Assignment Records, all states, utilized codes, file updated 11/01/2026 – the rows where the record's Use field is “AS” (assigned). Unavailable codes are excluded. The records say who received a block and when, not who serves a particular number today.
More about this code: overview · carriers · spam complaints · local time