| Business | Phone |
| Accord Communications 1480 28 St Ne #2, Calgary T2A 7W6 | (403) 272-1087 |
| Accurcom Engineering Ltd 111 Shawnee Rise Sw, Calgary T2Y 2S2 | (403) 254-5000 |
| Accutel.Com 999 8 St Sw #705, Calgary T2R 1J5 | (403) 215-8000 |
| Aria Solutions Inc 525 28 St Se #340, Calgary T2A 6W9 | (403) 235-0579 |
| Avaya Communications Inc 205 5 Ave Sw #1840, Calgary T2P 2V7 | (403) 515-3100 |
| Axia Super Net Ltd 450 1 St Sw #3300, Calgary T2P 5H1 | (403) 261-6446 |
| Industrial Billing Concepts 35 Sierra Morena Landng Sw, Calgary T3H 4K3 | (403) 217-9206 |
| Psinaptic Communications Inc 200 Rivercrest Dr Se, Calgary T2C 2X5 | (403) 720-2531 |
| Romania Public Safety Corp 5920 Macleod Trail Sw #600, Calgary T2H 0K2 | (403) 258-3348 |
| T I Telecom 202 6 Ave Sw #340, Calgary T2P 2R9 | (403) 509-3977 |
| Telcordia Technologies 400 3 Ave Sw #1500, Calgary T2P 4H2 | (403) 264-7618 |
| Telecommunications Management 250 6 Ave Sw #1200, Calgary T2P 3H7 | (403) 216-6090 |
| Tricrest Professional Svc Inc 316 Simons Rd Nw, Calgary T2K 2X1 | (403) 274-1717 |
| Triton Hospitality Comms Inc 8500 Macleod Trail Se #300e, Calgary T2H 2N1 | (403) 257-7090 |
| Wesbell Telecom Svc 5410 44 St Ne, Calgary T3J 3Z3 | (403) 293-5458 |
| Castle Communications Inc 10816 Macleod Trail Se #239, Calgary T2J 5N8 | (403) 257-7700 |
| Cellular Networking Ltd 2636 Toronto Cres Nw, Calgary T2N 3W1 | (403) 289-6609 |
| Empowered Networks Inc 2635 37 Ave Ne #225, Calgary T1Y 5Z6 | (403) 291-4040 |