| 1 | NTSX | NTL Transportation Ltd. | added 1/2009 | | NAKINA |
| 2 | NTSX | Northeast Transportation Service, Inc. | 1/1994; eliminated 10/1996 | | NAKINA |
| 3 | NTSX | Northeast Transportation Services, Co. | added 4/1988 | | NAKINA |
| 4 | NTSX | Northeast Transportation Services, Co. | added 4/88 | | NRHS |
| 5 | NTSX | Northeast Transportation Service, Inc. | 1/94; eliminated 10/96 | | NRHS |
| 6 | NTSX | NORTHEAST TRANSPORTATION SERVICES, INC. | | | PWRC |
| 7 | NTSX | NTL TRANSPORTATION LTD | | | SCAC4 |
