FULLERTON prefixes in area code 657
NANPA records 26 assigned NXX blocks to rate center FULLERTON in area code 657, 3.7% of the 703 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 T-MOBILE USA, INC. (5), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (5), BANDWIDTH.COM CLEC, LLC - CA (3). The earliest assignment on record here is 2008-11-21 and the most recent 2026-05-21. 26 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 codes 308, 701, 714 – 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 |
|---|---|---|---|---|
| 657-217 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2011-07-18 | yes | yes |
| 657-225 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2012-04-13 | yes | yes |
| 657-243 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2014-07-14 | yes | yes |
| 657-248 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-10-14 | yes | yes |
| 657-253 | T-Mobile T-MOBILE USA, INC. | 2014-10-17 | yes | yes |
| 657-278 | AT&T PACIFIC BELL | 2008-11-21 | yes | yes |
| 657-319 | T-Mobile T-MOBILE USA, INC. | 2018-03-29 | yes | yes |
| 657-330 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2012-04-13 | yes | yes |
| 657-354 | T-Mobile METROPCS NETWORKS, LLC | 2017-04-21 | yes | yes |
| 657-378 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2012-04-13 | yes | yes |
| 657-445 | T-Mobile T-MOBILE USA, INC. | 2015-10-19 | yes | yes |
| 657-500 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 657-525 | COMMIO, LLC | 2021-09-24 | yes | yes |
| 657-554 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2022-01-13 | yes | yes |
| 657-566 | FRACTEL, LLC | 2021-01-27 | yes | yes |
| 657-577 | FRACTEL, LLC | 2020-06-01 | yes | yes |
| 657-631 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2022-09-20 | yes | yes |
| 657-632 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2022-10-28 | yes | yes |
| 657-681 | T-Mobile T-MOBILE USA, INC. | 2023-08-23 | yes | yes |
| 657-706 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2023-10-13 | yes | yes |
| 657-749 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2024-05-21 | yes | yes |
| 657-751 | T-Mobile T-MOBILE USA, INC. | 2024-05-22 | yes | yes |
| 657-767 | TON80 COMMUNICATIONS, LLC | 2022-01-11 | yes | yes |
| 657-793 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2025-01-22 | yes | yes |
| 657-799 | FRACTEL, LLC | 2020-07-10 | yes | yes |
| 657-868 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2026-05-21 | 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 |
|---|---|---|---|
| T-MOBILE USA, INC. | T-Mobile | 5 | 19.2% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 5 | 19.2% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 3 | 11.5% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 3 | 11.5% |
| FRACTEL, LLC | – | 3 | 11.5% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 3.8% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 1 | 3.8% |
| PACIFIC BELL | AT&T | 1 | 3.8% |
| METROPCS NETWORKS, LLC | T-Mobile | 1 | 3.8% |
| ONVOY, LLC - CA | Onvoy | 1 | 3.8% |
| COMMIO, LLC | – | 1 | 3.8% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 3.8% |
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 FULLERTON in area code 657?
26 blocks: 217, 225, 243, 248, 253, 278, 319, 330, 354, 378, 445, 500 and 14 more, all listed in the table above.
Which carriers have numbers in FULLERTON?
T-MOBILE USA, INC. (5 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (5 blocks), BANDWIDTH.COM CLEC, LLC - CA (3 blocks), PEERLESS NETWORK OF CALIFORNIA, LLC - CA (3 blocks), FRACTEL, LLC (3 blocks), LEVEL 3 COMMUNICATIONS, 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 FULLERTON 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.