| Business | Phone |
| Alt Communications 150 Executive Center Dr, Greenville 29615 | (864) 627-0800 |
| Prime Line 135 Interstate Blvd # 8, Greenville 29615 | (864) 297-8100 |
| Prime Line Communications Inc Greenville 29615 | (864) 582-2442 |
| Signal Technologies Inc 740 Congaree Rd, Greenville 29607 | (864) 329-1990 |
| Teleco 430 Woodruff Rd # 300, Greenville 29607 | (864) 297-4400 |
| Telserv 80 Villa Rd, Greenville 29615 | (864) 232-0222 |