| Business | Phone |
| Maxwell Alarm 20327 Nordhoff St, Chatsworth 91311 | (818) 773-5533 |
| Sisco Home Electronics Inc 21630 Lassen St, Chatsworth 91311 | (818) 407-1245 |
| Far West Security Systems 20327 Lassen St, Chatsworth 91311 | (818) 886-9732 |
| Its 9500 Ventura Way, Chatsworth 91311 | (818) 704-9888 |
| Marlin Security Systems 10200 Mason Ave # 103, Chatsworth 91311 | (818) 704-9000 |
| Pacific Coast Alarms 9919 Canoga Ave, Chatsworth 91311 | (818) 709-5392 |
| Preferred Home Security 21220 Devonshire St # 104, Chatsworth 91311 | (818) 992-5276 |
| Protection Alarms 21901 Lassen St, Chatsworth 91311 | (818) 885-7726 |