| Business | Phone |
| Fdcservers.Net 141 W Jackson Blvd, Chicago 60604 | (312) 913-9200 |
| Cjr Ascor Inc 5310 N Cicero Ave, Chicago 60630 | (773) 283-6486 |
| Communication Zone Inc 329 W 18th St, Chicago 60616 | (312) 563-9460 |
| Data Resource Consultants 3001 S Michigan Ave, Chicago 60616 | (312) 949-0617 |
| Solai & Cameron Inc 5705 N Lincoln Ave, Chicago 60659 | (773) 506-2720 |