| Ajax Oil Co | 406-259-6464 | 111 N 30th St | Billings | MT | 59101 |
| Aloe Ventures | 406-434-5292 | 103 Teton Ave | Shelby | MT | 59474 |
| Baker Oil Tools Inc | 406-873-4211 | 601 E Railroad St | Cut Bank | MT | 59427 |
| Balcron Oil Co Ballard And Associates | 406-278-3049 | S W Of Conrad | Conrad | MT | 59425 |
| Batts John W Oil | 406-252-5609 | Petroleum Blbg | Billings | MT | 59101 |
| Bluejay Resources Inc | 406-873-2203 | 321 W Railroad St | Cut Bank | MT | 59427 |
| Breck Operating Corp | 406-278-3835 | S W Of Conrad | Conrad | MT | 59425 |
| Cardinal Drilling Co Shop | 406-248-2689 | 525 Jerrie Ln | Billings | MT | 59105 |
| Cenex Exploration & Propuction | 406-482-3349 | 2331 S Central Ave | Sidney | MT | 59270 |
| Cenex-Crude Oil Transport | 406-337-2560 | Kevin-Oilmont | Kevin | MT | 59454 |
| Choctaw II Oil & Gas Ltd | 406-482-5200 | S E Of Sidney | Sidney | MT | 59270 |
| Costilla Petroleum Co | 406-747-5316 | N W Of Fairview | Fairview | MT | 59221 |
| Croft Petroleum Co | 406-873-5547 | 214 N Central Ave | Cut Bank | MT | 59427 |
| D & J Surveying | 406-248-2812 | 1116 Dorothy Ln | Billings | MT | 59105 |
| D & M Water Service | 406-365-8556 | U S Hwy 16 North | Glendive | MT | 59330 |
| D & M Water Service | 406-778-3107 | 20 County Rd | Baker | MT | 59313 |
| Dar Oil & Gas Inc | 406-862-5101 | Lion Mtn | Whitefish | MT | 59937 |
| Eline Oilfield Services | 406-873-2752 | Burlington Northern Site | Cut Bank | MT | 59427 |
| Evensen Inc | 406-466-2929 | Airport Rd | Choteau | MT | 59422 |
| Foster John W & Melva | 406-666-2325 | Soap Creek Rd | Saint Xavier | MT | 59075 |
| Fulton Producing Co | 406-434-5579 | 127 Main St | Shelby | MT | 59474 |
| General Well Service Inc Office | 406-873-5081 | 25614 U S Hwy 2 | Cut Bank | MT | 59427 |
| General Well Service Inc Shop | 406-873-4862 | 25828 U S Hwy 2 | Cut Bank | MT | 59427 |
| Glacier Well Service Office | 406-873-5262 | 14 Lewis | Cut Bank | MT | 59427 |
| Great Northern Drilling Co Inc | 406-252-4658 | 1242 N 28th St | Billings | MT | 59101 |
| Great Plains Res Ksu | 406-358-2415 | N E Of Melstone | Melstone | MT | 59054 |
| H B & R Inc | 406-482-5601 | N Of Sidney | Sidney | MT | 59270 |
| Hamilton Resource Management | 406-259-6554 | 454 Sahara Dr | Billings | MT | 59105 |
| Hannah Drilling Co | 406-873-2178 | 308 2 S W | Cut Bank | MT | 59427 |
| Hardrock Oil Co | 406-453-6397 | 411 NW Bnk Big | Great Falls | MT | 59401 |
| Harris Rex Inc | 406-265-9791 | 7161 US Highway 2 W | Havre | MT | 59501 |
| Hawley Oil Co | 406-278-3522 | 410 S Colorado St | Conrad | MT | 59425 |
| Herco | 406-252-6821 | 113 N 28th St | Billings | MT | 59101 |
| Hi Line Trucking Inc | 406-482-1624 | S Of Sidney | Sidney | MT | 59270 |
| Hunt Oil Company | 406-482-7709 | S E Of Sidney | Sidney | MT | 59270 |
| Intermountain Leasing Inc | 406-248-6655 | 2812 1 Avenue | Billings | MT | 59101 |
| Interstate Engineering Inc | 406-256-1920 | 3300 2 Avenue | Billings | MT | 59101 |
| J & G Operating | 406-434-5124 | 230 Front St | Shelby | MT | 59474 |
| Jn Petroleum | 406-248-8888 | 550 N 31st St | Billings | MT | 59101 |
| Landtech Corp | 406-769-3351 | E Of Bainville | Bainville | MT | 59212 |
| Ledbetter John C | 406-252-3429 | 3021 6th Ave | Billings | MT | 59101 |
| Lowrance Co The | 406-873-5707 | 405 8th Ave S | Cut Bank | MT | 59427 |
| Lyon Oil | 406-862-2050 | PO Box 160 | Whitefish | MT | 59937 |
| Maxs Testing Inc | 406-873-4902 | E Railroad | Cut Bank | MT | 59427 |
| Meridian Oil | 406-255-8620 | 404 N 31st St | Billings | MT | 59101 |
| Mogo Inc | 406-873-2835 | Cbm Bldg 33 1 Avenue SW | Cut Bank | MT | 59427 |
| Montana Oil Well Cementers Inc Walters Fred | 406-873-2628 | 420 Mountain View Blvd | Cut Bank | MT | 59427 |
| Msr Exploration Ltd Cbm Bldg | 406-873-2235 | 33 1st Ave SW | Cut Bank | MT | 59427 |
| Msr Exploration Ltd Subsidiary Co Gypsy Highvi | 406-873-2845 | 33 1st Ave SW | Cut Bank | MT | 59427 |
| Nance Petroleum | 406-245-6248 | 550 N 31st St | Billings | MT | 59101 |
| Northern States Fishing Tools | 406-482-5720 | J D Industrial Park | Sidney | MT | 59270 |
| Northland Royalty Co | 406-259-5400 | 3030 4th Ave | Billings | MT | 59101 |
| Northwest Management Corp | 406-454-2440 | 8 5th St | Great Falls | MT | 59401 |
| Oil Well Perforator Inc | 406-365-2283 | E Of Glendive | Glendive | MT | 59330 |
| Paraffin Service Inc | 406-482-3399 | S Of Sidney | Sidney | MT | 59270 |
| Petroleum Engineering & Management Corp | 406-248-7395 | 100 N 27th St | Billings | MT | 59101 |
| Powers Elevation Co Inc | 406-873-5392 | 325 2nd Ave SE | Cut Bank | MT | 59427 |
| Prairie Wireline Service | 406-656-0338 | 1643 24th St W | Billings | MT | 59102 |
| Prairie Wireline Service Office | 406-873-5300 | 4 Hole Bros Rd | Cut Bank | MT | 59427 |
| Prairie Wireline Service Shop | 406-873-5011 | 4 Hold Brothers Rd | Cut Bank | MT | 59427 |
| Production Management Inc | 406-265-6671 | 1310 Glo Dr | Havre | MT | 59501 |
| Ranck Oil Co | 406-873-2591 | 118 E Main St | Cut Bank | MT | 59427 |
| Real Trucking | 406-482-6607 | S Of Sidney | Sidney | MT | 59270 |
| Rigging International | 406-543-4427 | 2501 S Catlin St | Missoula | MT | 59801 |
| Rigging International Fax Line | 406-543-4505 | 2501 S Catlin St | Missoula | MT | 59801 |
| Schlumberger Well Services Sales Office | 406-252-6344 | 328 First Citizens Bank Bldg | Billings | MT | 59101 |
| Shell Western E & P Inc Baker Production Offic | 406-778-3361 | N Of Baker | Baker | MT | 59313 |
| Silverado Production Services | 406-778-2765 | 611 S 2 West | Baker | MT | 59313 |
| Stokes Excavationinc | 406-278-5418 | N Of Conrad | Conrad | MT | 59425 |
| Texaco Exploration & Production Inc Bowes Fiel | 406-357-3411 | S Of Chinook | Chinook | MT | 59523 |
| Texaco Trading & Transportation Inc | 406-482-1444 | S E Of Sidney | Sidney | MT | 59270 |
| Union Oil Company Of California Production Dep | 406-873-5502 | 101 1st Ave SE | Cut Bank | MT | 59427 |
| Union Oil Company Of California Sccbsu Shop | 406-873-5019 | E Of Cut Bank | Cut Bank | MT | 59427 |
| Updike-Gibson Well Service Shop | 406-482-5713 | N Of Sidney | Sidney | MT | 59270 |
| Walker Willis L Oil | 406-259-3718 | Petroleum Bldg | Billings | MT | 59101 |
| Western Oil Well Service Co General Office | 406-365-5004 | S Of Glendive | Glendive | MT | 59330 |
| Western Oil Well Service Co Office | 406-365-5288 | S Of Glendive | Glendive | MT | 59330 |
