| Business | Phone |
| Associated Investigators 1208 Little Brook Ln, Birmingham 35235 | (205) 856-9266 |
| Brown Investigations Birmingham 35242 | (205) 980-9537 |
| Casteel Agency 3325 Lorna Rd # 2 Pmb 120, Birmingham 35216 | (205) 824-4492 |
| George J Watkins Consulting 205 20th St N, Birmingham 35203 | (205) 324-1444 |
| Eagle Investigations Inc 5333 1st Ave N, Birmingham 35212 | (205) 595-1966 |
| Corporate Special Svc 500 Chase Park S # 110, Birmingham 35244 | (205) 987-4800 |
| Crumbaugh & Assoc Inc 3325 Lorna Rd # 2-211, Birmingham 35216 | (205) 822-7000 |
| Investigations Inc 2012 Magnolia Ave S, Birmingham 35205 | (205) 930-9333 |
| J & M Investigations 5113 Skylark Dr, Birmingham 35242 | (205) 980-8003 |