| Business | Phone |
| Isi Telecom 1645 Dundas E, Oshawa | (905) 438-9753 |
| Brock Satellite 133 Taunton Rd W #K, Oshawa L1G 3T4 | (905) 433-2518 |
| Brown's Tv Tower Svc 1434 Tampa Cres, Oshawa L1G 6V2 | (905) 723-3397 |
| Esa Communications Systems 351 Wolfe St, Oshawa L1H 3T9 | (905) 725-9193 |