| Business | Phone |
| Us Faa Airport Administration Bldg, Billings 59105 | (406) 248-8384 |
| Us Faa Logan Airport, Billings 59101 | (406) 657-6979 |
| Us Faa Sector 1540 Lake Elmo Dr # 6, Billings 59105 | (406) 657-6981 |
| Us Faa Sector Logan Fld, Billings 59105 | (406) 657-6981 |
| Us Federal Railroad Adm 2929 3rd Ave N, Billings 59101 | (406) 657-6642 |
| Us Federal Railroad Adm 4250 Pine Hills Rd, Billings 59101 | (406) 896-1626 |