ECONTRCOST prefixes in area code 925
NANPA records 22 assigned NXX blocks to rate center ECONTRCOST in area code 925, 3.4% of the 640 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 13 holders hold those blocks, the largest being PACIFIC BELL (7), NEW CINGULAR WIRELESS PCS, LLC (2), ONVOY, LLC - CA (2). The earliest assignment on record here is 2001-03-01 and the most recent 2026-01-07. 19 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 925-240 | AT&T PACIFIC BELL | – | yes | yes |
| 925-306 | SONIC TELECOM, LLC - CA | 2017-01-13 | yes | yes |
| 925-308 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 925-390 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2016-04-11 | yes | yes |
| 925-392 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 925-418 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 925-420 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 925-450 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2020-06-26 | yes | yes |
| 925-508 | Onvoy ONVOY, LLC - CA | 2023-03-31 | yes | yes |
| 925-513 | AT&T PACIFIC BELL | – | yes | yes |
| 925-516 | AT&T PACIFIC BELL | – | no | yes |
| 925-559 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2026-01-07 | yes | yes |
| 925-578 | TON80 COMMUNICATIONS, LLC | 2020-11-03 | yes | yes |
| 925-625 | AT&T PACIFIC BELL | – | no | yes |
| 925-626 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 925-634 | AT&T PACIFIC BELL | – | no | yes |
| 925-666 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 925-679 | AT&T PACIFIC BELL | – | yes | yes |
| 925-684 | AT&T PACIFIC BELL | – | yes | yes |
| 925-809 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2001-03-01 | yes | yes |
| 925-832 | TON80 COMMUNICATIONS, LLC | 2022-01-31 | yes | yes |
| 925-880 | FRACTEL, LLC | 2021-07-13 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| PACIFIC BELL | AT&T | 7 | 31.8% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 2 | 9.1% |
| ONVOY, LLC - CA | Onvoy | 2 | 9.1% |
| TON80 COMMUNICATIONS, LLC | – | 2 | 9.1% |
| SONIC TELECOM, LLC - CA | – | 1 | 4.5% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 4.5% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 4.5% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 4.5% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 4.5% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 4.5% |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | 1 | 4.5% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 4.5% |
| FRACTEL, LLC | – | 1 | 4.5% |
Frequently asked
Which prefixes belong to ECONTRCOST in area code 925?
22 blocks: 240, 306, 308, 390, 392, 418, 420, 450, 508, 513, 516, 559 and 10 more, all listed in the table above.
Which carriers have numbers in ECONTRCOST?
PACIFIC BELL (7 blocks), NEW CINGULAR WIRELESS PCS, LLC (2 blocks), ONVOY, LLC - CA (2 blocks), TON80 COMMUNICATIONS, LLC (2 blocks), SONIC TELECOM, LLC - CA (1 block), LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ECONTRCOST a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.