ROBSTOWN prefixes in area code 361
NANPA records 10 assigned NXX blocks to rate center ROBSTOWN in area code 361, 1.9% of the 538 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. 7 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - TX (2), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (2), METROPCS, INC. (2). The earliest assignment on record here is 2001-09-27 and the most recent 2025-04-17. 7 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 361-236 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | 2003-05-21 | yes | yes |
| 361-310 | Onvoy ONVOY, LLC - TX | – | no | yes |
| 361-387 | Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | – | no | yes |
| 361-421 | STPCS JOINT VENTURE, LLC | 2025-04-17 | yes | yes |
| 361-426 | T-Mobile METROPCS, INC. | 2013-07-05 | yes | yes |
| 361-726 | T-Mobile METROPCS, INC. | 2001-09-27 | yes | yes |
| 361-752 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | 2006-10-02 | yes | yes |
| 361-767 | Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | – | no | yes |
| 361-933 | Charter TWC IP ENABLED SERVICES, LLC | 2002-10-14 | yes | yes |
| 361-966 | FRACTEL, LLC | 2021-07-26 | 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 |
|---|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 2 | 20% |
| FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | Frontier | 2 | 20% |
| METROPCS, INC. | T-Mobile | 2 | 20% |
| ONVOY, LLC - TX | Onvoy | 1 | 10% |
| STPCS JOINT VENTURE, LLC | – | 1 | 10% |
| TWC IP ENABLED SERVICES, LLC | Charter | 1 | 10% |
| FRACTEL, LLC | – | 1 | 10% |
Frequently asked
Which prefixes belong to ROBSTOWN in area code 361?
10 blocks: 236, 310, 387, 421, 426, 726, 752, 767, 933, 966. The table above gives the holder of each.
Which carriers have numbers in ROBSTOWN?
LEVEL 3 COMMUNICATIONS, LLC - TX (2 blocks), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (2 blocks), METROPCS, INC. (2 blocks), ONVOY, LLC - TX (1 block), STPCS JOINT VENTURE, LLC (1 block), TWC 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 ROBSTOWN 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.