| Business | Phone |
| Artel Electrical Contractors 76 Union Ave, Ronkonkoma 11779 | (631) 738-7600 |
| Barbato & Runinski Electrical 245 Ronkonkoma Ave, Ronkonkoma 11779 | (631) 737-1545 |
| Mainline Electric Corp 100 Arrival Ave, Ronkonkoma 11779 | (631) 737-5895 |
| C M Ritchey Electrical Contrs 77 Air Park Dr, Ronkonkoma 11779 | (631) 471-7555 |
| Cazco Electric 33 Balaton Ave, Ronkonkoma 11779 | (631) 580-4289 |
| Mjc Electric Inc Long Island Mcarthur Airport, Ronkonkoma 11779 | (631) 467-1117 |
| New Horizon Electrical Contr 37 Arlington Rd, Ronkonkoma 11779 | (631) 471-3022 |
| Emerald Electric 1951 Ocean Ave, Ronkonkoma 11779 | (631) 471-6696 |
| Envisage Industries 245 Ronkonkoma Ave, Ronkonkoma 11779 | (631) 737-9404 |
| Jeco Electric Inc 90 Raynor Ave # A, Ronkonkoma 11779 | (631) 737-5500 |
| John Giella Electric Co Inc 751 Koehler Ave, Ronkonkoma 11779 | (631) 738-1366 |
| John Paul Electric Inc 149 Comac St, Ronkonkoma 11779 | (631) 737-2233 |
| Jpo Electrical Contracting 40 Raynor Ave, Ronkonkoma 11779 | (631) 981-8299 |
| Kbm Electric Co 1951 Ocean Ave # 3, Ronkonkoma 11779 | (631) 737-4454 |
| Rfg Electrical Contracting 751 Koehler Ave, Ronkonkoma 11779 | (631) 467-2995 |
| Shamrock Electric Co 209 Avenue A, Ronkonkoma 11779 | (631) 471-0321 |
| Triple Phase Electric 181 Sioux St, Ronkonkoma 11779 | (631) 732-8236 |
| Web Electric 4 Sarah Ct, Ronkonkoma 11779 | (631) 981-8845 |