SULPHUR prefixes in area code 337
NANPA records 15 assigned NXX blocks to rate center SULPHUR in area code 337, 2.5% of the 599 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 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (5), NEW CINGULAR WIRELESS PCS, LLC - GA (4), LEVEL 3 COMMUNICATIONS, LLC - LA (2). The earliest assignment on record here is 2001-06-15 and the most recent 2024-12-30. 9 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 502, 580 – 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 |
|---|---|---|---|---|
| 337-215 | T-Mobile METROPCS, INC. | – | yes | yes |
| 337-287 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2001-06-15 | yes | yes |
| 337-313 | Lumen LEVEL 3 COMMUNICATIONS, LLC - LA | 2003-08-08 | yes | yes |
| 337-476 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2010-03-24 | yes | yes |
| 337-503 | Windstream PAETEC ITEL, LLC | 2005-10-27 | no | yes |
| 337-527 | AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | – | no | yes |
| 337-528 | AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | – | no | yes |
| 337-533 | AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | – | no | yes |
| 337-607 | Lumen LEVEL 3 COMMUNICATIONS, LLC - LA | 2016-01-15 | yes | yes |
| 337-625 | AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | – | no | yes |
| 337-626 | AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | – | no | yes |
| 337-674 | TON80 COMMUNICATIONS, LLC | 2022-01-27 | yes | yes |
| 337-712 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2024-12-30 | yes | yes |
| 337-888 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | – | yes | yes |
| 337-900 | Onvoy ONVOY, LLC - LA | 2015-03-20 | 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 |
|---|---|---|---|
| BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | AT&T | 5 | 33.3% |
| NEW CINGULAR WIRELESS PCS, LLC - GA | AT&T | 4 | 26.7% |
| LEVEL 3 COMMUNICATIONS, LLC - LA | Lumen | 2 | 13.3% |
| METROPCS, INC. | T-Mobile | 1 | 6.7% |
| PAETEC ITEL, LLC | Windstream | 1 | 6.7% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 6.7% |
| ONVOY, LLC - LA | Onvoy | 1 | 6.7% |
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 SULPHUR in area code 337?
15 blocks: 215, 287, 313, 476, 503, 527, 528, 533, 607, 625, 626, 674 and 3 more, all listed in the table above.
Which carriers have numbers in SULPHUR?
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (5 blocks), NEW CINGULAR WIRELESS PCS, LLC - GA (4 blocks), LEVEL 3 COMMUNICATIONS, LLC - LA (2 blocks), METROPCS, INC. (1 block), PAETEC ITEL, LLC (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 SULPHUR 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.