| Business | Phone |
| Wellington Investigations Inc Po Box 1006, Manassas 20108 | (703) 361-2697 |
| Bob Lessemun Investigations 9204 Church St, Manassas 20110 | (703) 580-6611 |
| Robert Douglas Assoc 8504 Clearridge Ln, Manassas 20110 | (703) 361-3410 |
| Do It Investigations Po Box 1897, Manassas 20108 | (703) 794-8999 |
| Nwi Investigative Group Inc 9051 Liberia Ave, Manassas 20110 | (703) 366-3281 |
| Mcas Inc 13371 Marie Dr, Manassas 20112 | (703) 794-8516 |
| Incite 7896 English St, Manassas 20112 | (703) 794-0805 |
| Investigative Svc Manassas 20110 | (703) 330-1310 |