| Business | Phone |
| A-1 Interstate Alarm Svc 939 N Long Ave, Chicago 60651 | (773) 626-2600 |
| Able Alarm Assistance 5248 S Kedzie Ave, Chicago 60632 | (773) 484-5178 |
| Alarm Specialists & Elecronics Chicago 60657 | (773) 528-8281 |
| General Burglar Alarm Co 8216 S Western Ave, Chicago 60620 | (773) 471-9200 |
| Bridgeport Security 440 S La Salle St 2500, Chicago 60605 | (312) 663-8071 |
| Ffivec 8757 S Escanaba Ave, Chicago 60617 | (773) 734-0500 |
| Castle Protection Alarm Co 5050 W Fletcher St, Chicago 60641 | (773) 736-7563 |
| Cdx Systems Chicago 60637 | (773) 684-7530 |
| Enterprise Security 2623 N Kimball Ave, Chicago 60647 | (773) 278-5553 |
| Emergency 24 Inc 3920 N Kedvale Ave, Chicago 60641 | (773) 736-2192 |
| Emergency 24 Inc 4179 W Irving Park Rd, Chicago 60641 | (773) 777-0707 |
| Eas Alarm Systems Specialist 8123 S Vernon Ave, Chicago 60619 | (773) 651-9258 |
| Chicago Sound & Communication 3765 N Wilton Ave, Chicago 60613 | (312) 280-8075 |
| Child Care Initiatives Alarm 2745 N Elston Ave, Chicago 60647 | (773) 782-0153 |
| Csf Security Systems 5137 W Foster Ave, Chicago 60630 | (773) 283-2948 |
| Custom Burglar & Fire 4118 N Lowell Ave, Chicago 60641 | (773) 427-1192 |