| 1 | UNBC | UNITED BULB COMPANY | | | SCAC4 |
| 2 | UNBD | UNIONVILLEDEPOT.COM | | | SCAC4 |
| 3 | UNBL | UNITED BLOWER INC | | | SCAC4 |
| 4 | UNBS | United Nazareth Bus Services | City: Nazareth | IL | TRAFFIC |
| 5 | UNBX | Union Boiler Repair, Fabrication & Erection Co., Inc. | added 7/1970; eliminated 10/1972 | | NAKINA |
| 6 | UNBX | Union Boiler Repair | added 10/1972; eliminated 11/1973 | | NAKINA |
| 7 | UNBX | General Electric Railcar Services Corp. | added 4/1999; eliminated 1/2000 | | NAKINA |
| 8 | UNBX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 9 | UNBX | Union Boiler Repair, Fabrication & Erection Co., Inc. | added 7/70; eliminated 10/72 | | NRHS |
| 10 | UNBX | Union Boiler Repair | added 10/72; eliminated 11/73 | | NRHS |
| 11 | UNBX | General Electric Railcar Services Corp. | added 4/99; eliminated 1/2000 | | NRHS |
| 12 | UNBX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 13 | UNBX | *UNION BOILER REPAIR | | | PWRC |
| 14 | UNBX | +GENERAL ELECTRIC RAIL SERVICES CORP. | | | PWRC |
| 15 | UNBX | General Electric Rail Services Corporation | | | RSRV |
| 16 | UNBX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
