| 1 | USB | Tusheti | Callsign: Tusheti, | GE | AVCODES |
| 2 | USB | Tusheti | | | ICAO1 |
| 3 | USBC | U S A BOUND CO | | | SCAC4 |
| 4 | USBG | USB FREIGHT INC | | | SCAC4 |
| 5 | USBK | U S BACKHAULER | | | SCAC4 |
| 6 | USBL | UNITED SKY LOGISTICS LIMITED | | | SCAC4 |
| 7 | USBR | US BROTHERS INC | | | SCAC4 |
| 8 | USBT | U S BULK TRANSPORT INC | | | SCAC4 |
| 9 | USBX | U.S. Borax & Chemical Corp. | added 7/1964; 7/1965-10/1966; eliminated 1/1969 | | NAKINA |
| 10 | USBX | North American Car Corp. | added 7/1982; eliminated 1/1984 | | NAKINA |
| 11 | USBX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 4/1999 | | NAKINA |
| 12 | USBX | The CIT Group/Capital Finance, Inc. | added 4/1999; 7/2000-7/2005 | | NAKINA |
| 13 | USBX | U.S. Borax & Chemical Corp. | added 7/64; 7/65-10/66; eliminated 1/69 | | NRHS |
| 14 | USBX | North American Car Corp. | added 7/82 | | NRHS |
| 15 | USBX | General Electric Railcar Services Corp. | 1/94; eliminated 4/99 | | NRHS |
| 16 | USBX | The CIT Group/Capital Finance, Inc. | added 4/99; 7/2000 | | NRHS |
| 17 | USBX | *U.S. BORAX & CHEMICAL CORP. | | | PWRC |
| 18 | USBX | +THE CIT GROUP/CAPITAL FINANCE, INC. [(NATX) GENERAL ELECTRIC RAILCAR SERVICES CORPORATION] | | | PWRC |
| 19 | USBX | US Borax & Chemical (CIT Group) | | | RSRV |
| 20 | USBX | CIT GROUP/CAPITAL FINANCE INC, THE | | | SCAC4 |
