| Business | Phone |
| All Island Security Inc 500 Old Country Rd # 101, Garden City 11530 | (516) 747-0233 |
| Digital Alarm Systems Inc 2 Bluebell Ct, Garden City 11530 | (516) 294-0150 |
| Executive Technology Systems 1 Commercial Ave, Garden City 11530 | (516) 771-6412 |
| First Call Security Inc 63 Transverse Rd, Garden City 11530 | (516) 747-9111 |
| Interstate Protective Co 1225 Franklin Ave # 325, Garden City 11530 | (718) 470-6766 |