| 1 | BYB | Bayern Bahn Betriebsgesellschaft | This company is the "commercial" part of the Bayerisches Eisenbahnmuseum in Nördlingen. They operate freight services to Wassertrüdingen and work trains to Dinkelsbühl, Dombühl and Gunzenhausen. | D | TRAFFIC |
| 2 | BYB | Bayern-Bahn-Betriebsgesellschaft | | DE | VKM |
| 3 | BYBB | BYBEE, BILLY TRUCKING | | | SCAC3 |
| 4 | BYBB | BYBEE, BILLY TRUCKING | | | SCAC4 |
| 5 | BYBC | BYRD BROTHERS LLC | | | SCAC4 |
| 6 | BYBF | BAILEY BROS FARM | | | SCAC4 |
| 7 | BYBG | BAGLEY & BAGLEY | | | SCAC4 |
| 8 | BYBH | BYTOWN BACKHAULERS LEASING LTD | | | SCAC4 |
| 9 | BYBK | BAYTANA BAKERY | | | SCAC4 |
| 10 | BYBL | BAY BELL LINES INC | | | SCAC3 |
| 11 | BYBN | BAYOU BARGE LINE INC | | | SCAC3 |
| 12 | BYBN | BYRD, BRIAN K | | | SCAC4 |
| 13 | BYBP | BYB TRANSPORTATION SERVICES INC | | | SCAC3 |
| 14 | BYBR | BOYD BROS INC | | | SCAC3 |
| 15 | BYBT | BUSY B TRANSPORTATION LLC | | | SCAC4 |
| 16 | BYBY | BRYAN & BRYAN TRUCKING LLC | | | SCAC4 |
