| Business | Phone |
| Rosebud Operating Svc 2215 N Frontage Rd, Billings 59101 | (406) 256-5296 |
| Southern Montana Elec 3521 Gabel Rd, Billings 59102 | (406) 294-9527 |
| Ppl Montana Llc 303 N 28th St # 400, Billings 59101 | (406) 869-5100 |
| Granite Peak Energy 1643 Lewis Ave # 3, Billings 59102 | (406) 896-0861 |
| Montana-Dakota Utilities Co 2603 2nd Ave N, Billings 59101 | (406) 896-4250 |