Phone numbers in Welsh, Louisiana
Welsh has 4 phone prefixes in area code 337.
Biggest holders: MetroPCS (T-Mobile), T-Mobile (including Sprint), Brightspeed Of Louisiana. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 75%
- Local phone company 25%
Every prefix in Welsh
Search the first six digits of a number in this list. If it's here, the number started in Welsh with the carrier shown. If it isn't, check the Louisiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 337-338 | MetroPCS (T-Mobile) | Mobile carrier | 2004 |
| 337-387 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 337-734 | Brightspeed Of Louisiana | Local phone company | – |
| 337-930 | Verizon Wireless | Mobile carrier | 2004 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.