TOMBALL prefixes in area code 346
NANPA records 18 assigned NXX blocks to rate center TOMBALL in area code 346, 2.4% of the 752 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 - TX (5), NEW CINGULAR WIRELESS PCS, LLC - IL (4), BANDWIDTH.COM CLEC, LLC - TX (2). The earliest assignment on record here is 2015-06-08 and the most recent 2025-12-17. 18 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 281, 713, 832 – 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 |
|---|---|---|---|---|
| 346-225 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2015-07-07 | yes | yes |
| 346-236 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2016-05-04 | yes | yes |
| 346-246 | AT&T SOUTHWESTERN BELL | 2017-03-27 | yes | yes |
| 346-273 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2017-09-20 | yes | yes |
| 346-336 | Charter CHARTER IP ENABLED SERVICES, LLC | 2016-08-30 | yes | yes |
| 346-367 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2018-10-04 | yes | yes |
| 346-416 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2020-01-08 | yes | yes |
| 346-468 | Vonage VONAGE AMERICA LLC | 2021-05-06 | yes | yes |
| 346-534 | Onvoy ONVOY, LLC - TX | 2021-12-14 | yes | yes |
| 346-572 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2022-07-01 | yes | yes |
| 346-598 | Charter ONVOY SPECTRUM, LLC | 2022-10-14 | yes | yes |
| 346-645 | Onvoy ONVOY, LLC - TX | 2020-11-06 | yes | yes |
| 346-695 | Onvoy ONVOY, LLC - TX | 2023-09-28 | yes | yes |
| 346-753 | COMMIO, LLC | 2023-12-21 | yes | yes |
| 346-765 | Charter ONVOY SPECTRUM, LLC | 2024-01-10 | yes | yes |
| 346-794 | Onvoy ONVOY, LLC - TX | 2024-04-12 | yes | yes |
| 346-808 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2015-06-08 | yes | yes |
| 346-913 | Onvoy ONVOY, LLC - TX | 2025-12-17 | 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 - TX | Onvoy | 5 | 27.8% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 4 | 22.2% |
| BANDWIDTH.COM CLEC, LLC - TX | Bandwidth | 2 | 11.1% |
| ONVOY SPECTRUM, LLC | Charter | 2 | 11.1% |
| SOUTHWESTERN BELL | AT&T | 1 | 5.6% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 1 | 5.6% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TX | AT&T | 1 | 5.6% |
| VONAGE AMERICA LLC | Vonage | 1 | 5.6% |
| COMMIO, LLC | – | 1 | 5.6% |
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 TOMBALL in area code 346?
18 blocks: 225, 236, 246, 273, 336, 367, 416, 468, 534, 572, 598, 645 and 6 more, all listed in the table above.
Which carriers have numbers in TOMBALL?
ONVOY, LLC - TX (5 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (4 blocks), BANDWIDTH.COM CLEC, LLC - TX (2 blocks), ONVOY SPECTRUM, LLC (2 blocks), SOUTHWESTERN BELL (1 block), CHARTER IP ENABLED SERVICES, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is TOMBALL 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.