| Business | Phone |
| F D Security Systems Inc 39 Katonah Ave # 2, Katonah 10536 | (914) 232-0792 |
| Knight Security Systems 143 Bedford Rd, Katonah 10536 | (914) 232-0003 |
| Patriot Security Systems 15 Sunrise Ave, Katonah 10536 | (914) 232-4123 |
| Vanguard Alarm Systems Inc 143 Bedford Rd, Katonah 10536 | (914) 769-8720 |