| Business | Phone |
| Asyncrob Technologies 3001 Mission Square Dr, Fairfax 22031 | (703) 591-6455 |
| Cam Communications 8305 Merrifield Ave A, Fairfax 22031 | (703) 204-1520 |
| Cicat Networks 9900 Main St, Fairfax 22031 | (703) 383-1400 |
| Federal Engineering Inc 10600 Arrowhead Dr 160, Fairfax 22030 | (703) 359-8200 |
| Searchnet Inc 10875 Main St, Fairfax 22030 | (703) 383-4885 |
| Systematic Software Engnrng 10680 Main St 170, Fairfax 22030 | (703) 385-7522 |
| Telecon Llc 2720 Prosperity Ave, Fairfax 22031 | (703) 270-2000 |
| Tkc Communications 11320 Random Hills Rd, Fairfax 22030 | (703) 934-8131 |
| Martin Communications Inc 4016 Williamsburg Ct, Fairfax 22032 | (703) 359-8900 |