| Business | Phone |
| Check-A-Mate Po Box 1270, Yorktown Heights 10598 | (718) 747-2576 |
| Fielding Protective Svc 1929 Commerce St # 11, Yorktown Heights 10598 | (914) 245-7320 |
| A-1 Investigations 2125 Brookside Ave, Yorktown Heights 10598 | (914) 962-0548 |
| Worldlink Investigative 1992 Commerce St, Yorktown Heights 10598 | (914) 245-5904 |