| Business | Phone |
| District Central Station Corp 140 S Columbus Ave, Mount Vernon 10553 | (914) 667-0001 |
| First Detection Systems 124 W Lincoln Ave # 1, Mount Vernon 10550 | (914) 667-3132 |
| Alarming Situations 407 Seneca Ave, Mount Vernon 10553 | (914) 668-8827 |
| Ktm Electronics 192 Stevens Ave, Mount Vernon 10550 | (914) 665-2100 |
| Regional Security Inc 145 Mount Vernon Ave, Mount Vernon 10550 | (914) 665-1505 |
| Space Age Alarms Inc 222 N 5th Ave, Mount Vernon 10550 | (914) 664-6152 |