SAN RAFAEL prefixes in area code 628
NANPA records 17 assigned NXX blocks to rate center SAN RAFAEL in area code 628, 8.8% of the 193 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. 8 holders hold those blocks, the largest being ONVOY, LLC - CA (7), T-MOBILE USA, INC. (3), FRACTEL, LLC (2). The earliest assignment on record here is 2015-03-13 and the most recent 2026-06-26. 16 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 415 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 628-234 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2015-03-13 | yes | yes |
| 628-240 | T-Mobile METROPCS, INC. | 2017-09-20 | yes | yes |
| 628-243 | Onvoy ONVOY, LLC - CA | 2015-12-01 | yes | yes |
| 628-253 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2016-07-25 | yes | yes |
| 628-269 | T-Mobile T-MOBILE USA, INC. | 2019-09-30 | yes | yes |
| 628-277 | Telnyx TELNYX LLC | 2021-01-29 | yes | yes |
| 628-285 | Onvoy ONVOY, LLC - CA | 2022-08-30 | yes | yes |
| 628-295 | Onvoy ONVOY, LLC - CA | 2023-09-19 | yes | yes |
| 628-305 | T-Mobile T-MOBILE USA, INC. | 2024-05-22 | yes | yes |
| 628-313 | T-Mobile T-MOBILE USA, INC. | 2021-11-03 | yes | yes |
| 628-314 | SHELCOMM | 2024-09-12 | no | yes |
| 628-327 | Onvoy ONVOY, LLC - CA | 2025-09-03 | yes | yes |
| 628-330 | Onvoy ONVOY, LLC - CA | 2026-06-26 | yes | no |
| 628-336 | FRACTEL, LLC | 2019-03-19 | yes | yes |
| 628-500 | Onvoy ONVOY, LLC - CA | 2015-03-26 | yes | yes |
| 628-667 | FRACTEL, LLC | 2020-11-17 | yes | yes |
| 628-888 | Onvoy ONVOY, LLC - CA | – | 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 |
|---|---|---|---|
| ONVOY, LLC - CA | Onvoy | 7 | 41.2% |
| T-MOBILE USA, INC. | T-Mobile | 3 | 17.6% |
| FRACTEL, LLC | – | 2 | 11.8% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 5.9% |
| METROPCS, INC. | T-Mobile | 1 | 5.9% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 5.9% |
| TELNYX LLC | Telnyx | 1 | 5.9% |
| SHELCOMM | – | 1 | 5.9% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to SAN RAFAEL in area code 628?
17 blocks: 234, 240, 243, 253, 269, 277, 285, 295, 305, 313, 314, 327 and 5 more, all listed in the table above.
Which carriers have numbers in SAN RAFAEL?
ONVOY, LLC - CA (7 blocks), T-MOBILE USA, INC. (3 blocks), FRACTEL, LLC (2 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (1 block), METROPCS, INC. (1 block), BANDWIDTH.COM CLEC, LLC - 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 SAN RAFAEL 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.