| A & G Radio & Television Repair Serv | 708-424-6868 | 9000 S Cicero Ave | Oak Lawn | IL | 60453 |
| A J R Radio & Speedometer Inc | 708-429-4114 | 15434 S 70th Ct | Orland Park | IL | 60462 |
| Access Systems Inc | 708-335-0009 | 1131 175th St | Homewood | IL | 60430 |
| Ajr Cellular | 708-482-8989 | 500 E Plainfield Rd | La Grange | IL | 60525 |
| Areawide Cellular | 708-748-8888 | 21100 Western Ave | Olympia Fields | IL | 60461 |
| Areawide Cellular | 708-560-0000 | 16651 Harlem Ave | Tinley Park | IL | 60477 |
| Audio Car Stereo Inc | 708-754-3770 | 196th & Halstd | Chicago Heights | IL | 60411 |
| Audio Plus Inc | 708-544-1500 | 226 25th Ave | Bellwood | IL | 60104 |
| Autotech Ltd | 708-652-8677 | 5200 W 26th St | Cicero | IL | 60650 |
| Awe | 708-201-1564 | 13759 S Halsted St | Riverdale | IL | 60627 |
| C & C Auto Security & Sound Auth Dlr Crime Sto | 708-633-0194 | 15523 S 70th Ct | Orland Park | IL | 60462 |
| C March & Assoc | 708-352-3211 | 413 S Catherine Ave | La Grange | IL | 60525 |
| Chi-Town Sounds | 708-403-9155 | 9228 W 159th St | Orland Park | IL | 60462 |
| Communication Control Systems | 708-562-1849 | 10450 W Cermak Rd | Westchester | IL | 60154 |
| D B & Sons Mobile Electronics | 708-206-1200 | 3721 W 171st | Country Club Hills | IL | 60478 |
| Delightful Autl Alarms | 708-755-1288 | 550 S Halsted St | Chicago Heights | IL | 60411 |
| Djs Fire & Safety Consultants | 708-449-8280 | 5161 Washington St | Hillside | IL | 60162 |
| Early Detection Systems Inc | 708-453-5000 | 2662 N Elm St | River Grove | IL | 60171 |
| Enterprise Security & Marketing | 708-481-4880 | 409 W 14th | Chicago Heights | IL | 60411 |
| Fenwal Inc | 708-351-9767 | 1635 W Wise Rd | Schaumburg | IL | 60193 |
| Fire & Security Specialists | 708-371-3007 | 4830 W 128th Pl | Alsip | IL | 60658 |
| Fire Safety Consultants Inc | 708-893-3665 | 1025 W Wise Rd | Schaumburg | IL | 60193 |
| Fox Security South | 708-636-0666 | 9856 S Cicero Ave | Oak Lawn | IL | 60453 |
| Franks Custom Auto Security Systems | 708-460-8511 | 13649 Southwest Hwy | Orland Park | IL | 60462 |
| Great Sounds & Security | 708-453-8678 | 8400 W Grand Ave | River Grove | IL | 60171 |
| Illinois Automotive Security | 708-371-9800 | 13610 Cicero Ave | Crestwood | IL | 60445 |
| Insight Industries Inc | 708-361-5080 | 13433 Southwest Hwy | Orland Park | IL | 60462 |
| Jessups Autosound & Communications | 708-579-5181 | 1140 N Maple Ave | La Grange Park | IL | 60526 |
| Mobile Music | 708-924-0660 | 227 E Army Trail Rd | Bloomingdale | IL | 60108 |
| Mobile Werks Sales-Srv Custm Stereo-Alarms | 708-403-4770 | 14344 S La Grange Rd | Orland Park | IL | 60462 |
| Music In Motion | 708-396-2888 | 13579 Cicero Ave | Crestwood | IL | 60445 |
| Potter-Roemer Inc | 708-766-4545 | 769 N Edgewood Ave | Wood Dale | IL | 60191 |
| Protection Plus Security Systems Inc | 708-489-1100 | 4139 W 123rd St | Alsip | IL | 60658 |
| Security Concepts | 708-201-1200 | 14150 Lincoln Ave | Dolton | IL | 60419 |
| Security Services | 708-841-7008 | 227 E 141st Pl | Dolton | IL | 60419 |
| Sound Advantage The | 708-236-7007 | 101 N Wolf Rd | Hillside | IL | 60162 |
| Sound Design Inc | 708-749-2944 | 1419 Harlem Ave | Berwyn | IL | 60402 |
| Sound Experience Inc | 708-351-6022 | 285 S Roselle Rd | Schaumburg | IL | 60193 |
| Triangle Auto Alarm | 708-499-3363 | 3339 W 95th St | Evergreen Park | IL | 60805 |
| Woodham Radio Serv | 708-458-8544 | 7200 Archer Ave | Summit Argo | IL | 60501 |
