| Business | Phone |
| Aspect Communications 7030 Woodbine Ave, Markham L3R 6G2 | (905) 479-0837 |
| Gowans Research Inc 52 Reeve Dr, Markham L3P 6B9 | (905) 201-8450 |
| Kaval Telecom Inc 60 Gough Rd, Markham L3R 8X7 | (905) 940-3860 |
| Ntg Intl Inc 90 Nolan Crt #1a, Markham L3R 4L9 | (905) 305-1325 |
| Prilink 18 Crown Steel Dr #303, Markham L3R 9X8 | (905) 305-0120 |
| Redline Communications Inc 90 Tiverton Crt, Markham L3R 9V2 | (905) 479-8344 |
| Schooley Mitchell Telecom 120 Ramona Blvd, Markham L3P 2K4 | (905) 471-9449 |
| Selectrom Telcom 50 Mcintosh Dr, Markham L3R 9T3 | (905) 947-1117 |
| Viocenet Interactive Inc 1020 Denison St, Markham L3R 3W5 | (905) 944-9447 |
| Comfort Communications Inc 200 Cochrane Dr #3, Markham L3R 8E8 | (905) 513-8833 |
| Fourseas Asia Link Corp 1001 Denison St, Markham L3R 2Z6 | (905) 513-7293 |
| Fox Group Consulting 69 Main St N, Markham L3P 1X7 | (905) 294-2821 |
| Future Galaxy Telecom 505 Hood Rd, Markham L3R 5V6 | (905) 513-0002 |