Phone numbers in Blenheim, South Carolina
Blenheim has 5 phone prefixes in area codes 843, 854.
Biggest holders: Level 3 (Lumen), AT&T (local phone), Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 20%
- Internet / business phone carrier 60%
- Phone company 20%
Every prefix in Blenheim
Search the first six digits of a number in this list. If it's here, the number started in Blenheim with the carrier shown. If it isn't, check the South Carolina page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 843-350 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 843-528 | AT&T (local phone) | Local phone company | – |
| 843-578 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 843-604 | AT&T Enterprises | Phone company | 2011 |
| 854-585 | Charter / Spectrum | Internet / business phone carrier | 2022 |
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.