| Business | Phone |
| Choice Alarm Co 205 S Western Ave, Los Angeles 90004 | (213) 251-8500 |
| Cross Watch Alarm Co 1914 W 8th St, Los Angeles 90057 | (213) 383-6767 |
| Engineers Protection Systems 5411 Valley Blvd, Los Angeles 90032 | (323) 224-6700 |
| Great Western Burglary Prtctn 4853 W Jefferson Blvd, Los Angeles 90016 | (323) 766-9883 |
| Priority Technology Systems 1313 W 8th St # 210, Los Angeles 90017 | (213) 989-2055 |
| Rimi Security Systems Inc 330 S La Brea Ave, Los Angeles 90036 | (323) 938-2061 |
| Sonitrol 725 W Washington Blvd, Los Angeles 90015 | (213) 749-0391 |
| United Alarm Systems Inc 2707 W Temple St, Los Angeles 90026 | (213) 389-4141 |
| Video Monitoring Svc 6430 W Sunset Blvd, Los Angeles 90028 | (323) 467-9848 |
| Mp Alarm Svc 10515 Lauriston Ave, Los Angeles 90064 | (310) 234-9267 |
| Alarm Works Los Angeles 90028 | (323) 467-0747 |
| Adt Edison Security 1544 Cotner Ave, Los Angeles 90025 | (310) 478-0301 |
| Integrated Auto Alarms Inc Los Angeles 90028 | (323) 461-0283 |
| I Q Security 12327 Santa Monica Blvd # A, Los Angeles 90025 | (310) 826-2123 |
| Long Beach Uniform Alarm Line 6365 Arizona Cir, Los Angeles 90045 | (310) 417-8614 |
| Net Work Systems 1313 W 8th St, Los Angeles 90017 | (213) 484-6979 |
| Swat Security Alarm Systems Los Angeles 90067 | (310) 556-0337 |
| Jess Security Systems Los Angeles 90036 | (323) 933-6698 |
| Alarm 24 3171 W Olympic Blvd # 505, Los Angeles 90006 | (213) 383-1000 |
| Advance Alarm Systems Los Angeles 90027 | (323) 668-2060 |
| Cobra Security Systems 3742 Tracy St, Los Angeles 90027 | (323) 469-4253 |
| Cross Watch Alarm Co 2300 W Pico Blvd, Los Angeles 90006 | (323) 766-8857 |
| G & A Security Systems 8424 Santa Monica Blvd, Los Angeles 90069 | (323) 656-5577 |
| Uni Sound & Security 1133 S Vermont Ave, Los Angeles 90006 | (213) 387-5331 |
| Hqc Imports Inc 2432 E 8th St, Los Angeles 90021 | (213) 236-0808 |
| Security 24 Alarm 2140 W Olympic Blvd, Los Angeles 90006 | (213) 388-2348 |
| Maximum Security Systems Los Angeles 90024 | (310) 474-1650 |
| Alarm Co Los Angeles 90003 | (323) 751-4000 |
| Circle Burglar Alarm Co Po Box 268a48, Los Angeles 90026 | (626) 968-3291 |
| All Pro Entry Systems 5522 S Mullen Ave, Los Angeles 90043 | (323) 299-5778 |
| Security For Less Po Box 291268, Los Angeles 90029 | (323) 953-2870 |
| South California Burglar Co Po Box 39a26, Los Angeles 90039 | (323) 953-1753 |
| United Alarm Systems Inc 1508 W Temple St, Los Angeles 90026 | (213) 389-4141 |
| Claud's Burglar & Fire Alarm 8007 S Western Ave, Los Angeles 90047 | (323) 750-7059 |
| Cal's Burglar Alarm Svc Los Angeles 90018 | (323) 734-1815 |
| Gard Burglar Alarm Co Los Angeles 90042 | (323) 256-2994 |
| Western Pacific Montoring Sys Los Angeles 90039 | (323) 873-4833 |
| U S Security Industries Los Angeles 90042 | (323) 255-5047 |
| Aacco Alarm Systems Los Angeles 90041 | (323) 877-1180 |