| Business | Phone |
| Atco Power 919 11 Ave Sw #800, Calgary T2R 1P3 | (403) 209-6900 |
| Atco Limited 909 11 Ave Sw #1500, Calgary T2R 1N6 | (403) 292-7500 |
| Ngx Canada Inc 140 4 Ave Sw #2330, Calgary T2P 3N3 | (403) 974-1700 |
| Trans Canada Power Lp 450 1 St Sw, Calgary T2P 5H1 | (403) 920-7980 |