| Abbreviation | Definition |
|---|---|
| NCTU | Northbrook Container Leasing |
| NCTX | GE Rail Services |
| NCTX | PLM International Incorporated |
| NCUU | TIP Intermodal Services |
| NCUU | Transport International Pool Incorporated |
| NCUX | Newcourt Capital USA |
| NCVA | North Carolina and Virginia Railroad |
| NCWX | Northwest Container Services |
| NCWX | Northwest Container Services Incorporated |
| NCYR | Nash County Railroad |
| NCYR | Nash County Railroad Corporation |
| NDCR | N D C Railroad Company |
| NDCR | National Docks Connecting Railway |
| NDCR | NDC Railroad |
| NDEM | Ferrocarriles Nacionales de México |
| NDLS | New Delhi Station |
| NDM | Ferrocarriles Nacionales de Mexico |
| NDMZ | Ferrocarriles Nacionales de México |
| NDMZ | National Railways of Mexico (Ferrocarriles Nacionales) |
| NDT | Ferrocarril Nacional de Tehuantepec |