SOMERTON prefixes in area code 928
NANPA records 16 assigned NXX blocks to rate center SOMERTON in area code 928, 2.5% of the 637 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. 9 holders hold those blocks, the largest being ONVOY, LLC - AZ (4), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (3), T-MOBILE USA, INC. (2). The earliest assignment on record here is 2002-08-15 and the most recent 2023-09-20. 14 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 740 – 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 |
|---|---|---|---|---|
| 928-236 | Onvoy ONVOY, LLC - AZ | 2016-02-10 | yes | yes |
| 928-285 | AT&T AT&T - LOCAL | 2012-08-08 | yes | yes |
| 928-315 | T-Mobile T-MOBILE USA, INC. | 2007-09-07 | yes | yes |
| 928-323 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2012-05-18 | yes | yes |
| 928-390 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2022-03-09 | yes | yes |
| 928-398 | Onvoy ONVOY, LLC - AZ | 2020-12-08 | yes | yes |
| 928-430 | IP HORIZON LLC | 2021-09-03 | yes | yes |
| 928-504 | Onvoy ONVOY, LLC - AZ | – | no | yes |
| 928-510 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2023-09-19 | yes | yes |
| 928-512 | ALLO COMMUNICATIONS LLC | 2023-09-20 | yes | yes |
| 928-550 | T-Mobile T-MOBILE USA, INC. | 2005-06-02 | yes | yes |
| 928-627 | Lumen QWEST CORPORATION | – | no | yes |
| 928-655 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2018-06-14 | yes | yes |
| 928-722 | Lumen QWEST CORPORATION | 2002-08-15 | yes | yes |
| 928-843 | TON80 COMMUNICATIONS, LLC | 2022-02-10 | yes | yes |
| 928-928 | Onvoy ONVOY, LLC - AZ | 2022-09-26 | 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 - AZ | Onvoy | 4 | 25% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | Verizon | 3 | 18.8% |
| T-MOBILE USA, INC. | T-Mobile | 2 | 12.5% |
| QWEST CORPORATION | Lumen | 2 | 12.5% |
| AT&T - LOCAL | AT&T | 1 | 6.2% |
| LEVEL 3 COMMUNICATIONS, LLC - AZ | Lumen | 1 | 6.2% |
| IP HORIZON LLC | – | 1 | 6.2% |
| ALLO COMMUNICATIONS LLC | – | 1 | 6.2% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 6.2% |
Frequently asked
Which prefixes belong to SOMERTON in area code 928?
16 blocks: 236, 285, 315, 323, 390, 398, 430, 504, 510, 512, 550, 627 and 4 more, all listed in the table above.
Which carriers have numbers in SOMERTON?
ONVOY, LLC - AZ (4 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (3 blocks), T-MOBILE USA, INC. (2 blocks), QWEST CORPORATION (2 blocks), AT&T - LOCAL (1 block), LEVEL 3 COMMUNICATIONS, LLC - AZ (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is SOMERTON 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.