Phone numbers in McCormick, South Carolina
McCormick has 5 phone prefixes in area codes 821, 864.
Biggest holders: Onvoy, Frontier, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 20%
- Internet / business phone carrier 20%
- Phone company 20%
Every prefix in McCormick
Search the first six digits of a number in this list. If it's here, the number started in McCormick with the carrier shown. If it isn't, check the South Carolina page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 821-529 | Onvoy | Internet / business phone carrier | 2025 |
| 864-465 | Frontier | Local phone company | – |
| 864-550 | AT&T Mobility | Mobile carrier | 2003 |
| 864-602 | Verizon Wireless | Mobile carrier | 2003 |
| 864-852 | West Carolina Communications | Phone company | 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.