| 1 | NCR | Air Sur | IATA: KG, Callsign: Nacar, Formerly Canafrica Transportes A�reos SA | E | AVCODES |
| 2 | NCR | Canafrica Transportes Aéreos SA | IATA: KG, Callsign: Nacar, Renamed Air Sur | E | AVCODES |
| 3 | NCR | National Air Cargo Group, Inc. d/b/a National Airlines | IATA: N8, Callsign: National Cargo, IATA Prefix: 416, Name changed from Murray Air, Inc. ICAO designator changed from MUA. Name changed from Murray Aviation, Inc. | USA | AVCODES |
| 4 | NCR | KANSAS CITY SOUTHERN RAILWAY COMPANY [NORTH CENTRAL RAILWAY CO.] | | | PWRC |
| 5 | NCR | Northern Central Railway | | USA | TRAFFIC |
| 6 | NCRA | NORTH COAST RELOCATION INC | | | SCAC4 |
| 7 | NCRC | Nebraska Central R.R. Co. | 1/1994-7/2005 | | NAKINA |
| 8 | NCRC | North Country R.R. Corp. | added 7/1980; eliminated 1/1982 | | NAKINA |
| 9 | NCRC | North Country R.R. Corp. | added 7/80; eliminated 1/82 | | NRHS |
| 10 | NCRC | Nebraska Central R.R. Co. | 1/94-7/2000 | | NRHS |
| 11 | NCRC | *NORTH COUNTRY RAILROAD CORP. | | | PWRC |
| 12 | NCRC | +NEBRASKA CENTRAL RAILROAD COMPANY | | | PWRC |
| 13 | NCRC | Nebraska Central Railroad | | | RSRV |
| 14 | NCRC | NEBRASKA CENTRAL RAILROAD | | | SCAC4 |
| 15 | NCRC | Nebraska Central Railroad Company | | USA | TRAFFIC |
| 16 | NCRD | NATIONAL CAR DELIVERY COMPANY | | | SCAC3 |
| 17 | NCRG | NORSTAR CARGO SYSTEMS INC | | | SCAC4 |
| 18 | NCRI | NOW COURIER OF RI INC | | | SCAC3 |
| 19 | NCRL | NC RAILROAD INC. | | | PWRC |
| 20 | NCRL | NU-CAR RELEASING CO LTD | | | SCAC3 |
| 21 | NCRL | NC RAILROAD INC | | | SCAC4 |
| 22 | NCRR | *NORTH COAST RAILROAD | | | PWRC |
| 23 | NCRR | *NORTH CAROLINA RAILROAD | | | PWRC |
| 24 | NCRR | North Carolina Railroad | | | RSRV |
| 25 | NCRR | NORTH COAST RAILROAD | | | SCAC4 |
| 26 | NCRS | N C R SERVICE | | | SCAC3 |
| 27 | NCRS | NANCY EXPRESS INC | | | SCAC4 |
| 28 | NCRU | NORTH AMERICAN CONTAINER SYSTEM (TIP INTERMODAL SERVICES [TRANSAMERICA LEASING)] | | | PWRC |
| 29 | NCRU | TIP Intermodal Services | | | RSRV |
| 30 | NCRW | NEW CAPITAL ROADWAYS LTD | | | SCAC4 |
| 31 | NCRX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 32 | NCRX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 1/2000 | | NAKINA |
| 33 | NCRX | North American Car Corp. | added 1/1976; 1/1980; eliminated 1/1984 | | NAKINA |
| 34 | NCRX | North American Car (Canada) Ltd. | added 7/1966; 4/1970-1/1975; eliminated 1/1976 | | NAKINA |
| 35 | NCRX | North American Car (Canada) Ltd. | added 7/66; 4/70-1/75 | | NRHS |
| 36 | NCRX | North American Car Corp. | Jan-80 | | NRHS |
| 37 | NCRX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 38 | NCRX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 39 | NCRX | *(NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [NORTH AMERICAN CAR CORP.] | | | PWRC |
| 40 | NCRX | *NORTH COAST RAILROAD | | | PWRC |
| 41 | NCRX | GE Rail Services | | | RSRV |
| 42 | NCRX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 43 | NCRY | Northern Central Ry., Inc. | 7/2000 | | NAKINA |
| 44 | NCRY | Northern Central Ry., Inc. | Jul-00 | | NRHS |
| 45 | NCRY | NORTHERN CENTRAL RAILWAY | | | PWRC |
| 46 | NCRY | Northern Central Railway | | | RSRV |
