Phone numbers in Barnwell, South Carolina
Barnwell has 31 phone prefixes in area codes 803, 839.
Biggest holders: AT&T Mobility, AT&T (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 68%
- Local phone company 13%
- Internet / business phone carrier 19%
Every prefix in Barnwell
Search the first six digits of a number in this list. If it's here, the number started in Barnwell with the carrier shown. If it isn't, check the South Carolina page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 803-224 | AT&T (local phone) | Local phone company | – |
| 803-259 | AT&T (local phone) | Local phone company | – |
| 803-300 | AT&T Mobility | Mobile carrier | – |
| 803-301 | AT&T Mobility | Mobile carrier | 2023 |
| 803-450 | AT&T Mobility | Mobile carrier | 2001 |
| 803-541 | AT&T (local phone) | Local phone company | – |
| 803-571 | Verizon Wireless | Mobile carrier | 2001 |
| 803-591 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 803-621 | Idt America | Internet / business phone carrier | 2008 |
| 803-671 | AT&T Mobility | Mobile carrier | 2001 |
| 803-709 | AT&T Mobility | Mobile carrier | 2005 |
| 803-868 | Palmetto Telephone Communications | Local phone company | 2018 |
| 803-918 | AT&T Mobility | Mobile carrier | 2020 |
| 803-946 | AT&T Mobility | Mobile carrier | 2020 |
| 803-963 | AT&T Mobility | Mobile carrier | 2021 |
| 839-208 | AT&T Mobility | Mobile carrier | 2021 |
| 839-233 | AT&T Mobility | Mobile carrier | 2023 |
| 839-242 | AT&T Mobility | Mobile carrier | 2023 |
| 839-245 | Onvoy | Internet / business phone carrier | 2023 |
| 839-259 | AT&T Mobility | Mobile carrier | 2023 |
| 839-267 | TON80 Communications | Internet / business phone carrier | 2022 |
| 839-276 | AT&T Mobility | Mobile carrier | 2024 |
| 839-279 | Onvoy | Internet / business phone carrier | 2024 |
| 839-289 | AT&T Mobility | Mobile carrier | 2025 |
| 839-296 | AT&T Mobility | Mobile carrier | 2024 |
| 839-303 | AT&T Mobility | Mobile carrier | 2024 |
| 839-309 | AT&T Mobility | Mobile carrier | 2025 |
| 839-312 | AT&T Mobility | Mobile carrier | 2025 |
| 839-315 | AT&T Mobility | Mobile carrier | 2025 |
| 839-316 | AT&T Mobility | Mobile carrier | 2025 |
| 839-569 | Onvoy | 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.