| Business | Phone |
| 3 D's Security Svc Inc 8448 Reseda Blvd # 103, Northridge 91324 | (818) 700-8825 |
| Select Security 8821 Reseda Blvd, Northridge 91324 | (818) 886-3099 |
| Alarm Engineers 11145 Tampa Ave, Northridge 91326 | (818) 831-5390 |
| Bodyguard Alarm System Inc 17600 Nayall St, Northridge 91325 | (818) 349-3238 |
| Wilson Security Systems 9018 Balboa Blvd # 601, Northridge 91325 | (818) 609-9981 |