| Business | Phone |
| Ace Security Systems Co 43 Nottingham Way, Mahopac 10541 | (845) 621-1170 |
| All Alert Alarm Ltd 551 Route 6, Mahopac 10541 | (845) 628-5020 |
| All-Star Security & Comms 135 Carey St, Mahopac 10541 | (914) 683-8663 |
| Line Security Systems 7 Queens Way, Mahopac 10541 | (845) 628-3671 |
| World Wide Electronic Equip 696 Route 6, Mahopac 10541 | (845) 628-7430 |