Phone numbers in Seneca, South Carolina
Seneca has 27 phone prefixes in area codes 821, 864.
Biggest holders: AT&T (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 48%
- Local phone company 33%
- Internet / business phone carrier 11%
- Phone company 7%
Every prefix in Seneca
Search the first six digits of a number in this list. If it's here, the number started in Seneca with the carrier shown. If it isn't, check the South Carolina page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 821-214 | AT&T Mobility | Mobile carrier | 2025 |
| 864-247 | AT&T Mobility | Mobile carrier | – |
| 864-280 | AT&T Mobility | Mobile carrier | 2005 |
| 864-324 | T-Mobile (including Sprint) | Mobile carrier | – |
| 864-364 | MetroPCS (T-Mobile) | Mobile carrier | 2011 |
| 864-482 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 864-499 | Verizon Wireless | Mobile carrier | 2017 |
| 864-539 | AT&T (local phone) | Local phone company | 2014 |
| 864-557 | AT&T Mobility | Mobile carrier | 2003 |
| 864-614 | Verizon Wireless | Mobile carrier | 2013 |
| 864-710 | Verizon Wireless | Mobile carrier | – |
| 864-723 | Verizon Wireless | Mobile carrier | – |
| 864-776 | Onvoy | Internet / business phone carrier | 2021 |
| 864-784 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 864-789 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 864-827 | Total Communication Systems | Phone company | – |
| 864-873 | AT&T (local phone) | Local phone company | 2008 |
| 864-880 | Total Communication Systems | Phone company | – |
| 864-882 | AT&T (local phone) | Local phone company | – |
| 864-885 | AT&T (local phone) | Local phone company | – |
| 864-886 | AT&T (local phone) | Local phone company | – |
| 864-888 | AT&T (local phone) | Local phone company | – |
| 864-903 | AT&T Mobility | Mobile carrier | – |
| 864-904 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 864-972 | AT&T (local phone) | Local phone company | – |
| 864-973 | AT&T (local phone) | Local phone company | – |
| 864-985 | AT&T (local phone) | Local phone company | – |
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.