| Business | Phone |
| Long Island Communications 4 Loft Rd, Smithtown 11787 | (631) 351-8403 |
| D C Communications 1041 W Jericho Tpke # D, Smithtown 11787 | (631) 864-7657 |
| North Shore Telecommunications 88 W Main St, Smithtown 11787 | (631) 361-8000 |
| Office Phone Systems Of Ny 5 North Ave, Smithtown 11787 | (631) 979-0248 |