Phone numbers in Youngsville, Louisiana
Youngsville has 7 phone prefixes in area code 337.
Biggest holders: AT&T (local phone), Lafayette City-parish Consolidated Government, Comcast. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 29%
- Internet / business phone carrier 43%
- Phone company 29%
Every prefix in Youngsville
Search the first six digits of a number in this list. If it's here, the number started in Youngsville with the carrier shown. If it isn't, check the Louisiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 337-450 | Lafayette City-parish Consolidated Government | Phone company | 2017 |
| 337-451 | Comcast | Internet / business phone carrier | – |
| 337-573 | AT&T Enterprises | Phone company | 2011 |
| 337-619 | Onvoy | Internet / business phone carrier | 2024 |
| 337-856 | AT&T (local phone) | Local phone company | – |
| 337-857 | AT&T (local phone) | Local phone company | – |
| 337-858 | Windstream (PAETEC) | Internet / business phone carrier | 2005 |
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.