| Business | Phone |
| Fowler Electronic Security Inc 527 Elizabeth Rd, Yorktown Heights 10598 | (914) 962-7702 |
| Alarm Specialists 3330 Terrytown Rd, Yorktown Heights 10598 | (914) 962-1999 |
| Marshall Alarm Systems Inc 2096 Van Cortlandt Cir, Yorktown Heights 10598 | (914) 962-4699 |