| Business | Phone |
| Adi 1859 Lakeland Ave, Ronkonkoma 11779 | (631) 471-2202 |
| Associated Security Svc Inc Ronkonkoma 11779 | (631) 585-0768 |
| Bilsan Central Station Alarm 122 Portion Rd, Ronkonkoma 11779 | (631) 588-0022 |
| East Coast Burglar & Fire Syst 405 Thrift St, Ronkonkoma 11779 | (631) 580-5047 |