| Business | Phone |
| Five Stars Intl Ltd 4160 Se International Way D207, Portland 97222 | (503) 652-1634 |
| Barber Investigations 14135 Sw 97th Pl # H-274, Portland 97224 | (503) 620-0404 |
| Abc Intl Investigations Po Box 4545, Portland 97208 | (503) 221-1223 |
| Able Investigations Portland 97217 | (503) 702-0899 |
| Western Information Svc 5621 Sw Hood Ave, Portland 97239 | (503) 892-9207 |
| Vehicular Forensics 2448 E Burnside St, Portland 97214 | (503) 731-2710 |
| Amy Dier Investigations Po Box 4264, Portland 97208 | (503) 704-0214 |
| True Associates Po Box 66040, Portland 97290 | (503) 228-0098 |
| Tuthill Inc 1906 Sw Madison St, Portland 97205 | (503) 274-1819 |
| Arch Investigations 1332 Se Umatilla St, Portland 97202 | (503) 239-5003 |
| Associated Legal Investigators 10151 Sw Barbur Blvd, Portland 97219 | (503) 892-3531 |
| Bieberle Investigations Po Box 1906, Portland 97207 | (503) 296-6878 |
| Bridge City Investigations 833 Se Main St, Portland 97214 | (503) 235-0003 |
| Business Risks Inc Portland 97236 | (503) 760-2072 |
| Roger W Morse Investigations 621 Sw Morrison St # 414, Portland 97205 | (503) 760-7300 |
| Ctg & Assoc 7446 Sw Fulton Park Blvd, Portland 97219 | (503) 892-2332 |
| Quest Investigative Svc 1500 Sw 1st Ave, Portland 97201 | (503) 241-1118 |
| David Halloran Research 2362 Se 105th Ave, Portland 97216 | (503) 256-4704 |
| Peter Kepfer Po Box 1644, Portland 97207 | (503) 224-6636 |
| Filler Investigations Po Box 301444, Portland 97294 | (503) 256-2703 |
| Oregon Board Of Investigators 800 Ne Oregon St # 445, Portland 97232 | (503) 731-4359 |
| Oregon Legal Investigations Po Box 19424, Portland 97280 | (503) 246-0481 |
| Pacific Investigations Portland 97220 | (503) 255-0170 |
| Fps Investigations 418 Sw Washington St # 403, Portland 97204 | (503) 228-4311 |
| Gateway Enforcement 948 Ne 102nd Ave # 104, Portland 97220 | (503) 273-2873 |
| Newton Investigations 1700 Sw Jefferson St, Portland 97201 | (503) 227-2450 |
| Michael Mackintosh Investigtns Portland 97204 | (503) 242-0185 |
| Mark Berrest Investigations 17112 Se Powell Blvd # 2, Portland 97236 | (503) 669-2715 |
| Marosi & Assoc Portland 97236 | (503) 760-2072 |
| Informationa Specialists Portland 97204 | (503) 224-5284 |
| Internal Affairs Private Invs 11220 Se Stark St, Portland 97216 | (503) 256-4933 |
| Irish Investigative Svc 134 Ne 125th Ave, Portland 97230 | (503) 257-3054 |
| Jerry W Elshire Investigator 8530 Se Con Battin Rd, Portland 97266 | (503) 788-1820 |
| Lawyer's Legal Svc 3301 Sw Barbur Blvd # 200, Portland 97239 | (503) 224-7911 |
| Kara L Beus Research Invest 1906 Sw Madison St, Portland 97205 | (503) 224-8758 |
| Keith A Weeks Legal Invstgtr 800 Nw 6th Ave # 333, Portland 97209 | (503) 226-8599 |
| Donna Snelling Invstgtr 4702 Sw Scholls Ferry Rd # 116, Portland 97225 | (503) 646-5101 |
| Pearson Investigations Po Box 25780, Portland 97298 | (503) 292-4640 |
| Linda O'Neal Investigations 8995 Sw Center St, Portland 97223 | (503) 624-8391 |
| Janet Tapper Pvt Investigator 3300 Nw 185th Ave # 203, Portland 97229 | (503) 533-4109 |