KATY prefixes in area code 346
NANPA records 13 assigned NXX blocks to rate center KATY in area code 346, 1.7% 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 (4), LEVEL 3 COMMUNICATIONS, LLC - TX (2), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX (1). The earliest assignment on record here is 2015-08-19 and the most recent 2026-07-22. 13 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, 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 |
|---|---|---|---|---|
| 346-257 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | 2017-05-15 | yes | yes |
| 346-307 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 2015-08-19 | yes | yes |
| 346-387 | ETS TELEPHONE COMPANY, INC. | 2016-02-24 | yes | yes |
| 346-457 | STRATUS NETWORKS | 2021-03-09 | yes | yes |
| 346-527 | Onvoy ONVOY, LLC - TX | 2021-11-19 | yes | yes |
| 346-608 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | 2022-12-01 | yes | yes |
| 346-615 | Onvoy ONVOY, LLC - TX | 2023-02-08 | yes | yes |
| 346-637 | TON80 COMMUNICATIONS, LLC | 2022-01-14 | yes | yes |
| 346-667 | FRACTEL, LLC | 2020-06-18 | yes | yes |
| 346-759 | COMMIO, LLC | 2023-12-21 | yes | yes |
| 346-827 | Onvoy ONVOY, LLC - TX | 2024-06-07 | yes | yes |
| 346-851 | Onvoy ONVOY, LLC - TX | 2025-01-09 | yes | yes |
| 346-934 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2026-07-22 | yes | no |
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 | 4 | 30.8% |
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 2 | 15.4% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | Verizon | 1 | 7.7% |
| ETS TELEPHONE COMPANY, INC. | – | 1 | 7.7% |
| STRATUS NETWORKS | – | 1 | 7.7% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 7.7% |
| FRACTEL, LLC | – | 1 | 7.7% |
| COMMIO, LLC | – | 1 | 7.7% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 1 | 7.7% |
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 KATY in area code 346?
13 blocks: 257, 307, 387, 457, 527, 608, 615, 637, 667, 759, 827, 851 and 1 more, all listed in the table above.
Which carriers have numbers in KATY?
ONVOY, LLC - TX (4 blocks), LEVEL 3 COMMUNICATIONS, LLC - TX (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX (1 block), ETS TELEPHONE COMPANY, INC. (1 block), STRATUS NETWORKS (1 block), TON80 COMMUNICATIONS, 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 KATY 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.