| Business | Phone |
| Amtel Communications Systems 400 Creditstone Rd, Concord L4K 3Z3 | (905) 738-5593 |
| Norcom Supply Inc 358 Edgeley Blvd, Concord L4K 3Y1 | (905) 760-1211 |
| Tel-Alliance 160 Applewood Cres, Concord L4K 4H2 | (905) 760-9959 |
| Teletrend Communications 110 Snow Blvd #4, Concord L4K 4B8 | (905) 738-5192 |
| Tortel Communications 434 North Rivermede Rd, Concord L4K 3M9 | (905) 660-9661 |
| First Canadian Telecom 470 North Rivermede Rd, Concord L4K 3R8 | (905) 660-7890 |