| Business | Phone |
| Basin Electric Power Co-Op 1717 E Interstate Ave, Bismarck 58503 | (701) 223-0441 |
| Capital Electric Cooperative 4111 State St, Bismarck 58503 | (701) 223-1513 |
| Montana-Dakota Utilities Co 122 E Broadway Ave, Bismarck 58501 | (701) 221-4320 |
| Montana-Dakota Utilities Co 400 N 4th St, Bismarck 58501 | (701) 224-5850 |
| Montana-Dakota Utilities Co 909 Airport Rd, Bismarck 58504 | (701) 224-5800 |