Phone numbers in Landrum, South Carolina
Landrum has 4 phone prefixes in area codes 821, 864.
Biggest holders: Windstream South Carolina, Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 50%
- Internet / business phone carrier 50%
Every prefix in Landrum
Search the first six digits of a number in this list. If it's here, the number started in Landrum with the carrier shown. If it isn't, check the South Carolina page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 821-444 | Onvoy | Internet / business phone carrier | 2025 |
| 864-457 | Windstream South Carolina | Local phone company | – |
| 864-510 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 864-702 | Windstream South Carolina | Local phone company | 2015 |
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.