| Business | Phone |
| Abco Electric Corp 1361 Lincoln Ave, Holbrook 11741 | (631) 467-4445 |
| Eastern Electrical Co Holbrook 11741 | (631) 275-3027 |
| Eldor Contraction Corp 1703 Church St, Holbrook 11741 | (631) 218-0010 |
| Empire State Electric 115 2nd St, Holbrook 11741 | (631) 981-1597 |
| One Shot Electric Inc 54 Glenmere Way, Holbrook 11741 | (631) 472-1531 |
| Relle Electric 1347 Lincoln Ave # 7, Holbrook 11741 | (631) 580-6111 |
| Rippner Electrical 1347 Lincoln Ave, Holbrook 11741 | (631) 981-9341 |
| Rippner Electrical Constr 1720 Church St, Holbrook 11741 | (631) 567-7560 |
| V P Electric Inc 1695 Church St, Holbrook 11741 | (631) 218-8989 |
| Watt Ever Electric 38 Donald St, Holbrook 11741 | (631) 580-0452 |