SIERRAMADR prefixes in area code 626
NANPA records 17 assigned NXX blocks to rate center SIERRAMADR in area code 626, 2.3% of the 737 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. 12 holders hold those blocks, the largest being FRONTIER CALIFORNIA INC. (5), T-MOBILE USA, INC. (2), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (1). The earliest assignment on record here is 2022-04-26 and the most recent 2024-01-23. 15 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 |
|---|---|---|---|---|
| 626-264 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 626-306 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 626-325 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 626-351 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 626-355 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 626-466 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 626-470 | AT&T PACIFIC BELL (COMPETITIVE) | – | yes | yes |
| 626-507 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 626-510 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 626-604 | SKYE TELECOM LLC DBA SKYETEL | – | yes | yes |
| 626-708 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 626-745 | T-Mobile T-MOBILE USA, INC. | 2024-01-23 | yes | yes |
| 626-790 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 626-822 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 626-828 | FRACTEL, LLC | 2022-04-26 | yes | yes |
| 626-836 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 626-921 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | 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 |
|---|---|---|---|
| FRONTIER CALIFORNIA INC. | Frontier | 5 | 29.4% |
| T-MOBILE USA, INC. | T-Mobile | 2 | 11.8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 5.9% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 5.9% |
| PACIFIC BELL (COMPETITIVE) | AT&T | 1 | 5.9% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 5.9% |
| PAETEC ITEL, LLC | Windstream | 1 | 5.9% |
| SKYE TELECOM LLC DBA SKYETEL | – | 1 | 5.9% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 5.9% |
| ONVOY, LLC - CA | Onvoy | 1 | 5.9% |
| FRACTEL, LLC | – | 1 | 5.9% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 5.9% |
Frequently asked
Which prefixes belong to SIERRAMADR in area code 626?
17 blocks: 264, 306, 325, 351, 355, 466, 470, 507, 510, 604, 708, 745 and 5 more, all listed in the table above.
Which carriers have numbers in SIERRAMADR?
FRONTIER CALIFORNIA INC. (5 blocks), T-MOBILE USA, INC. (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block), PACIFIC BELL (COMPETITIVE) (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 SIERRAMADR 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.