| Business | Phone |
| Municipal Police & Fire Rgstry 930 N York Rd 18, Hinsdale 60521 | (630) 920-0571 |
| Joseph P Mahr Investigations 120 E Ogden Ave, Hinsdale 60521 | (630) 325-0505 |
| Reynold's & Assoc 15 Spinning Wheel Rd, Hinsdale 60521 | (630) 850-7311 |
| Tri-County Investigations 7 S Lincoln St, Hinsdale 60521 | (630) 655-1313 |