| Business | Phone |
| All American Detective Agency 9116 E Sprague Ave 467, Spokane 99206 | (509) 323-0137 |
| Case Preparation Svc Po Box 9172, Spokane 99209 | (509) 276-2068 |
| Executive Investigations Spokane 99205 | (509) 220-5625 |
| G/T Investigations Llc 222 W Mission Ave 110, Spokane 99201 | (509) 838-1421 |
| J Scrivner Investigations 9116 E Sprague Ave 472, Spokane 99206 | (509) 928-6541 |
| Mike Lewton Private Invstgtns Spokane 99205 | (509) 328-6107 |
| Nichols & Assoc Private Invest 315 W 9th Ave, Spokane 99204 | (509) 326-4469 |
| Parker Investigations Po Box 20038, Spokane 99204 | (509) 747-8581 |
| Pinnacle Professional Svc Ps 5805 E Sharp Ave 2, Spokane 99212 | (509) 891-1266 |
| Professional Investigations 106 W Mission Ave 107, Spokane 99201 | (509) 326-3635 |
| Skyline Search Inc Po Box 30454, Spokane 99223 | (509) 443-1652 |
| Stealth Services 1201 W Spofford Ave, Spokane 99205 | (509) 217-0938 |
| Verus Research Inc 7406 E Strauge Ave, Spokane 99212 | (509) 922-6188 |