| 1 | BFIF | Big Fork & International Falls Ry. | 4/1938-1/1941 | | NAKINA |
| 2 | BFIF | Big Fork & International Falls Ry. | Apr-38 | | NRHS |
| 3 | BFIF | BIG FORK & INTERNATIONAL FALLS RWY. | | | PWRC |
| 4 | BFIF | B-FIFTY TWO (B-52) EXPRESS LINES IN | | | SCAC3 |
| 5 | BFII | BROWNING-FERRIS INDUSTRIES INC | | | SCAC3 |
| 6 | BFIJ | BY FREIGHT INCORPORATED | | | SCAC4 |
| 7 | BFIK | BASIN FARMING INC | | | SCAC4 |
| 8 | BFIL | BOONES FARM INK LLC | | | SCAC4 |
| 9 | BFIN | B-FOUR (B-4) TRANSPORT CO INC - JB | | | SCAC4 |
| 10 | BFIQ | BASIC FIBRES INC | | | SCAC4 |
| 11 | BFIR | BFI TRANSPORTATION INC | | | SCAC3 |
| 12 | BFIR | BUSH FIRE SERVICES | | | SCAC4 |
| 13 | BFIU | BAILEE FREIGHT HOLLAND B.V. | | | SCAC3 |
| 14 | BFIV | B FIVE (B5) INC | | | SCAC4 |
| 15 | BFIX | Bethlehem Steel Corp. | added 7/1995; eliminated 1/1999; 7/2000-7/2005 (not listed) | | NAKINA |
| 16 | BFIX | Brown Forest Industries Ltd., a Division of Brown Co. | added 1/1969 (reporting marks changed from KVPX); 4/1970-1/1980; eliminated 4/1981 | | NAKINA |
| 17 | BFIX | Borden's Farm Products Co., Inc. | 7/1930-7/1935 | | NAKINA |
| 18 | BFIX | Borden's Farm Products Division of the Borden Co. | 7/1937-7/1954; eliminated 7/1957 | | NAKINA |
| 19 | BFIX | Borden's Farm Products Division of the Borden Co. | 4/38-1/52 | | NRHS |
| 20 | BFIX | Brown Forest Industries Ltd., a Division of Brown Co. | added 1/69 (reporting marks changed from KVPX); 4/70-1/80; eliminated 4/81 | | NRHS |
| 21 | BFIX | Bethlehem Steel Corp. | added 7/95; eliminated 1/99; 7/2000 | | NRHS |
| 22 | BFIX | *BORDEN'S FARM PRODUCTS DIV. BORDON CO. | | | PWRC |
| 23 | BFIX | *BROWN FOREST INDUSTRIES LTD., DIV. BROWN CO. | | | PWRC |
| 24 | BFIX | +BETHLEHEM STEEL CORPORATION | | | PWRC |
| 25 | BFIX | Bethlehem Steel Corporation | | | RSRV |
| 26 | BFIY | BRYANS FARM AND INDUSTRIAL SUPPLY L | | | SCAC4 |
