| Business | Phone |
| Arm Communications 34 Hillsley Rd, Darien 6820 | (203) 972-3170 |
| Burke Communications 15 Duffys Ln, Darien 6820 | (203) 655-8000 |
| Cameron Communications 338 Middlesex Rd, Darien 6820 | (203) 655-3655 |
| Communication Partnership Darien 6820 | (203) 656-2000 |