| Business | Phone |
| Accurate Information Tech Chicago 60619 | (773) 783-3400 |
| Ats Inc 4144 N Melvina Ave, Chicago 60634 | (773) 481-0931 |
| Automatic Answering Systems 3416 W Bryn Mawr Ave, Chicago 60659 | (773) 478-8000 |
| Benchmark Communications Chicago 60661 | (312) 559-1544 |
| Gentel/Pager One 4750 N Milwaukee Ave, Chicago 60630 | (773) 353-8118 |
| Georgina's Enterprise 6305 W Grand Ave, Chicago 60639 | (773) 889-7301 |
| Blitz Communication Inc 10407 S Western Ave, Chicago 60643 | (773) 779-2177 |
| Bradley Communications Inc 2701 W Hirsch St 2, Chicago 60622 | (773) 828-8174 |
| Bti Communications Group Ltd 150 N Michigan Ave 3200, Chicago 60601 | (312) 563-1999 |
| Digital Directions 941 W Randolph St, Chicago 60607 | (312) 633-1900 |
| Davis Financial Svc 8700 W Bryn Mawr Ave 800, Chicago 60631 | (773) 714-5130 |
| Cymbal Communications Corp 7512 W Devon Ave, Chicago 60631 | (773) 774-2004 |
| Converging Networks Group 2636 W Belmont Ave, Chicago 60618 | (773) 539-7900 |