| Business | Phone |
| A R Evans 3820 Tommy Armour Cir, Billings 59106 | (406) 656-9155 |
| Ballard Petroleum Holding 845 12th St W, Billings 59102 | (406) 259-8790 |
| Beartooth Oil & Gas Co 2812 1st Ave N # 525, Billings 59101 | (406) 259-2451 |
| Bexco 845 12th St W, Billings 59102 | (406) 248-5760 |
| Big Snowy Resource Lp 27 N 27th St # 2100, Billings 59101 | (406) 248-2227 |
| Stewart Geological Inc 710 Grand Ave, Billings 59101 | (406) 259-2580 |
| Swede Swenson Denali Drilling 2812 1st Ave N # 434, Billings 59101 | (406) 652-6547 |
| Sands Oil Co 27 N 27th St # 2102, Billings 59101 | (406) 245-7714 |
| Spence Accounts Inc 100 N 27th St # 305, Billings 59101 | (406) 245-9424 |
| Prospector Oil Inc 2812 1st Ave N # 307, Billings 59101 | (406) 294-9765 |
| Reliable Exploration Inc 868 Parkway Ln, Billings 59101 | (406) 259-1860 |
| Robinson Oil Co Llc 100 N 27th St # 640, Billings 59101 | (406) 248-4929 |
| Energy Consultants Llc 100 N 27th St, Billings 59101 | (406) 248-2222 |
| F H Petroleum Corp 2812 1st Ave N, Billings 59101 | (406) 245-2009 |
| Nance Petroleum 550 N 31st St, Billings 59101 | (406) 245-6248 |
| Hoefle Geologic Co 2812 1st Ave N # 502, Billings 59101 | (406) 254-1295 |
| Hoefle Oil Co 2812 1st Ave N # 508, Billings 59101 | (406) 655-4447 |
| Hoefle Oil Co 742 Park Ln, Billings 59102 | (406) 259-3482 |
| Jack Mc Kee Oil Properties 404 N 31st St, Billings 59101 | (406) 256-5655 |
| Lone Mountain Production Co 2590 Holman Ave # B1, Billings 59102 | (406) 245-5077 |
| Macum Energy Inc 730 Main St # 103, Billings 59105 | (406) 254-1054 |
| Mc Bane Energy 2812 1st Ave N # 422, Billings 59101 | (406) 254-2216 |