| Business | Phone |
| Fti Consulting 333 W Wacker Dr 600, Chicago 60606 | (312) 759-8100 |
| Burnside Investigations Inc 400 E Randolph St 1402, Chicago 60601 | (312) 938-1776 |
| Cis Investigation Svc 3423 N Hamilton Ave, Chicago 60618 | (773) 528-9900 |
| a 1 skiptracing 9049 S Carpenter St., Chicago 60620 | (708) 420-2531 |
| a 1 skiptracing 3400 W 111th St., Chicago 60655 | (708) 420-2531 |