| Business | Phone |
| Connected Technologies 10609 Moore St, Fairfax 22030 | (703) 385-8090 |
| Engineering Professional Svc 3879 Plaza Dr, Fairfax 22030 | (703) 934-9662 |
| Inter-Tel Technologies Inc 10555 Main St, Fairfax 22030 | (703) 903-0100 |
| Young Telecom Inc 3251 Old Lee Hwy 512, Fairfax 22030 | (703) 273-1755 |