| Business | Phone |
| A T & T 3033 Chain Bridge Rd, Fairfax 22030 | (703) 319-0905 |
| Datatel Inc 4375 Fair Lakes Ct, Fairfax 22033 | (703) 968-9000 |
| Dmlc Communications Inc 2929 Eskridge Rd T, Fairfax 22031 | (703) 204-9800 |
| Fairfax Income Tax Svc 10605 Judicial Dr B3, Fairfax 22030 | (703) 691-9028 |
| Mci 10431 Lee Hwy, Fairfax 22030 | (703) 877-2165 |
| Telcordia Fairfax 22030 | (703) 691-1933 |
| Voice Wise Technologies Fairfax 22030 | (703) 934-9699 |
| L S Technologies Llc 2750 Prosperity Ave 640, Fairfax 22031 | (703) 205-9683 |