SOUR LAKE prefixes in area code 409
NANPA records 3 assigned NXX blocks to rate center SOUR LAKE in area code 409, 0.7% of the 434 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. 3 holders hold those blocks, the largest being SOUTHWESTERN BELL (1), AHOI LLC (1), LEVEL 3 COMMUNICATIONS, LLC - TX (1). The earliest assignment on record here is 2005-02-10 and the most recent 2025-11-13. 3 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 |
|---|---|---|---|---|
| 409-287 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 409-438 | AHOI LLC | 2025-11-13 | yes | yes |
| 409-445 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | 2005-02-10 | 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 |
|---|---|---|---|
| SOUTHWESTERN BELL | AT&T | 1 | 33.3% |
| AHOI LLC | – | 1 | 33.3% |
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 1 | 33.3% |
Frequently asked
Which prefixes belong to SOUR LAKE in area code 409?
3 blocks: 287, 438, 445. The table above gives the holder of each.
Which carriers have numbers in SOUR LAKE?
SOUTHWESTERN BELL (1 block), AHOI LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - TX (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is SOUR LAKE 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.