| Business | Phone |
| Castillo Technologies 1865 Paseo San Luis, Sierra Vista 85635 | (520) 458-2304 |
| Clark Information Systems 1840 S Highway 92, Sierra Vista 85635 | (520) 458-0293 |
| Hyperion Inc 1601 Paseo San Luis, Sierra Vista 85635 | (520) 459-3740 |
| Phonesmith Sierra Vista 85635 | (520) 452-0047 |