| Business | Phone |
| Arc Document Research Inc 205 W Randolph St, Chicago 60606 | (312) 346-4895 |
| Asm Enterprise 1353 S Blue Island Ave, Chicago 60608 | (312) 421-9923 |
| Foreclosure Reports Chicago 60616 | (312) 842-9200 |
| Heartland Historical Research 2714 S Hillock Ave, Chicago 60608 | (312) 842-8933 |