| 1 | NIFB | NINE ONE FOUR ZERO-ONE TWO EIGHT ON | | | SCAC4 |
| 2 | NIFC | NINE ZERO SIX EIGHT-FIVE EIGHT ONE | | | SCAC4 |
| 3 | NIFD | NINA INTERNATIONAL FOOD | | | SCAC4 |
| 4 | NIFF | NAVTRANS INTERNATIONAL FREIGHT FORW | | | SCAC3 |
| 5 | NIFS | NIGHTHAWK FRT SERV INC | | | PWRC |
| 6 | NIFS | NICHOLS FLUID SERVICE INC | | | SCAC3 |
| 7 | NIFS | NINE ZERO FIVE NINE FIVE SIX THREE | | | SCAC4 |
| 8 | NIFX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 9 | NIFX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 1/2000 | | NAKINA |
| 10 | NIFX | North American Car Corp. | added 4/1960; 4/1961-1/1980; eliminated 1/1984 | | NAKINA |
| 11 | NIFX | North American Car Corp. | 4/61-1/80 | | NRHS |
| 12 | NIFX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 13 | NIFX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 14 | NIFX | (NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [NORTH AMERICAN CAR CORP.] | | | PWRC |
| 15 | NIFX | GE Rail Services | | | RSRV |
| 16 | NIFX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
