| Business | Phone |
| Ritter Laber & Assoc 603 Main St, Williston 58801 | (701) 774-0314 |
| Diamond Resources Inc 202 Main St, Williston 58801 | (701) 572-4523 |
| Dublin Co 322 Main St # 18, Williston 58801 | (701) 774-3423 |
| Empire Oil Co 510 2nd St W, Williston 58801 | (701) 774-2845 |
| Nodana Petroleum Corp 501 E Broadway, Williston 58801 | (701) 572-6366 |
| Norman Jessen & Assoc Inc 118 1st Ave W, Williston 58801 | (701) 572-6776 |
| Nance Petroleum Corp 501 E Broadway, Williston 58801 | (701) 774-3321 |
| Mineral Land Svc Inc 22 1st Ave E, Williston 58801 | (701) 572-4666 |
| John H Holt Oil Properties 322 Main St # 202, Williston 58801 | (701) 774-1200 |
| Kasmer & Aafedt Oil Inc 719 E Broadway, Williston 58801 | (701) 572-7231 |