| Business | Phone |
| Cartwright Communication Tech 1035 Data Ln, Knoxville 37932 | (865) 966-1544 |
| Central Communications 1413 Cline St, Knoxville 37921 | (865) 525-2308 |
| Commercial Radio Systems 11317 Yarnell Rd, Knoxville 37932 | (865) 690-1915 |
| Professional Communication Svc 1411 N 6th Ave, Knoxville 37917 | (865) 525-8968 |
| Metro Communications 1210 Elm St, Knoxville 37921 | (865) 546-0311 |