| Business | Phone |
| Alarm Acquisitions 16 N Marengo Ave, Pasadena 91101 | (626) 396-9115 |
| Cal Tek Alarms 714 Heatherside Rd, Pasadena 91105 | (626) 449-3188 |
| Crown Alarm Co Pasadena 91105 | (626) 441-5446 |
| Newmark Security Systems 1355 Lomay Pl, Pasadena 91103 | (626) 793-6195 |
| Silent Tiger Systems 2425 Cooley Pl, Pasadena 91104 | (626) 791-8857 |