| Business | Phone |
| Cames' Security Alarms Inc 450 S Lone Hill Ave, San Dimas 91773 | (909) 592-1636 |
| Excel Systems & Solutions 137 E Arrow Hwy, San Dimas 91773 | (909) 599-4800 |
| California Custom Alarm 814 Sheffield Ct, San Dimas 91773 | (909) 592-9600 |
| Performance Alarm Systems 636 N Smead Way, San Dimas 91773 | (909) 599-9683 |
| Statewide Security Systems 229 W Bonita Ave, San Dimas 91773 | (909) 599-2292 |