| Business | Phone |
| Data Center 11200 Waples Mill Rd 100, Fairfax 22030 | (703) 359-2400 |
| Diversified Technical Svc-Va 2711 Prosperity Ave, Fairfax 22031 | (703) 560-7096 |
| Ds3 12500 Fair Lakes Cir 210, Fairfax 22033 | (703) 968-8100 |
| Four Soft Inc 3022 Javier Rd, Fairfax 22031 | (703) 573-7740 |
| Netstar Systems Inc 3702 Pender Dr, Fairfax 22030 | (703) 714-0400 |
| Psi Intl 10306 Eaton Pl 400, Fairfax 22030 | (703) 352-9013 |
| Systems Sciences Inc 10605 Judicial Dr, Fairfax 22030 | (703) 273-8264 |
| Universal Conversion Svc Inc 2931 Eskridge Rd H, Fairfax 22031 | (703) 289-3005 |
| Uunet Technologies Inc 3060 Williams Dr, Fairfax 22031 | (703) 206-5600 |