| Business | Phone |
| Alert Alarms Inc 25 John St, Derby 6418 | (203) 736-0171 |
| Alliance Security Alarms 171 Shagbark Dr, Derby 6418 | (203) 888-6622 |
| Barnum Engineered Systems Inc 495 Roosevelt Dr, Derby 6418 | (203) 734-8823 |
| Pro-Active Communication Svc 54 Atwater Ave, Derby 6418 | (203) 732-3000 |