| Business | Phone |
| De Witt Enterprises Inc 1155 Mission St Se # 201, Salem 97302 | (503) 371-4731 |
| G E Mallow Investigations 433 Court St Ne, Salem 97301 | (503) 363-0242 |
| Jesus Gonzales Pvt Invstgtr 1655 Capitol St Ne, Salem 97303 | (503) 363-1217 |
| Mc Callum Investigations Po Box 2241, Salem 97308 | (503) 851-5488 |
| N W Bureau Investigation 1613 Chukar Ct Nw, Salem 97304 | (503) 365-7934 |
| Nisbet-Lance Investigations Po Box 5186, Salem 97304 | (503) 378-1581 |
| Nordsman Inc Salem 97301 | (503) 606-0368 |
| Perkins Investigations Salem 97301 | (503) 370-7523 |
| R B Investigations Salem 97301 | (503) 370-4100 |
| Shadow Investigations Po Box 7391, Salem 97303 | (503) 949-7774 |
| State Investigative Svc Po Box 3211, Salem 97302 | (503) 378-1262 |
| Tmi Investigations Po Box 2241, Salem 97308 | (503) 851-2472 |