| 1 | NC | National Jet Systems Pty. Ltd. | ICAO: NJS, Callsign: National Jet, Name changed to National Jet Systems Pty. Ltd. t/a Cobham Aviation Services Australia - Airline Services w.e.f. 13 May 2009. Designator NC reinstated by IATA | AUS | AVCODES |
| 2 | NC | Northern Air Cargo, Inc. | ICAO: NAC, Callsign: Yukon, IATA Prefix: 345, ICAO callsign changed from Northern Air Cargo. Name changed to Northern Air Cargo, LLC. | USA | AVCODES |
| 3 | NC | Northern Air Cargo, Inc. | ICAO: NAC, Callsign: Northern Air Cargo, IATA Prefix: 345, ICAO callsign changed to Yukon | USA | AVCODES |
| 4 | NC | North Central Airlines, Inc. | Callsign: North Central, | USA | AVCODES |
| 5 | NC | Nippon Cargo Airlines | ICAO: NCA, Callsign: Nippon Cargo, IATA designator changed to KZ | J | AVCODES |
| 6 | NC | Cobham Aviation Services Australia | ICAO: NJS, Name changed from National Jet Systems Pty. Ltd. t/a Cobham Aviation Services Australia - Airline Services w.e.f. 13 May 2009. Designator NC recalled by IATA | AUS | AVCODES |
| 7 | NC | Northern Air Cargo, LLC. | ICAO: NAC, Callsign: Yukon, IATA Prefix: 345, ICAO callsign changed from Northern Air Cargo. Name changed from Northern Air Cargo, Inc. | USA | AVCODES |
| 8 | NC | CSX Transportation, Inc. | added 7/1987; 1/1994-7/2005 | | NAKINA |
| 9 | NC | Seaboard System R.R., Inc. | added 1/1983; eliminated 7/1987 | | NAKINA |
| 10 | NC | Louisville and Nashville R.R. Co. | eliminated 1/1983 | | NAKINA |
| 11 | NC | Louisville and Nashville R.R. Co. (Nashville, Chattanooga & St. Louis) | 1/1975-1/1980 | | NAKINA |
| 12 | NC | Nashville Chattanooga & St. Louis Ry. | 7/1965 | | NAKINA |
| 13 | NC | Nashville Chattanooga & St. Louis Ry. | Jul-65 | | NRHS |
| 14 | NC | Louisville and Nashville R.R. Co. (Nashville, Chattanooga & St. Louis) | 1/75-1/80 | | NRHS |
| 15 | NC | Louisville and Nashville R.R. Co. | eliminated 1/83 | | NRHS |
| 16 | NC | Seaboard System R.R., Inc. | added 1/83; eliminated 7/87 | | NRHS |
| 17 | NC | CSX Transportation, Inc. | added 7/87; 1/94-7/2000 | | NRHS |
| 18 | NC | CSX [SEABOARD; NASHVILLE, CHATTANOOGA & ST. LOUIS RY] | | | PWRC |
| 19 | NC | Nashville and Chattanooga Railroad (CSX Transportation) | | | RSRV |
| 20 | NC | Nashville Chattanooga & St. Louis Ry. | | USA | TRAFFIC |
| 21 | NC | NordCargo S.r.l. | | IT | VKM |
| 22 | NC&S | Neame, Carson & Southern R.R. Co. | 7/1923 | | NAKINA |
| 23 | NC&S | NEAME, CARSON & SOUTHERN RAILROAD CO. | | | PWRC |
| 24 | NC&STL | NASHVILLE, CHATTANOOGA & ST. LOUIS | | | PWRC |
| 25 | NCA | Nippon Cargo Airlines | IATA: KZ, Callsign: Nippon Cargo, IATA Prefix: 933, IATA designator changed from MC | J | AVCODES |
| 26 | NCA | Nippon Cargo Airlines | IATA: NC, Callsign: Nippon Cargo, IATA designator changed to KZ | J | AVCODES |
| 27 | NCA | Nippon Cargo Airlines | IATA: KZ | | ICAO1 |
| 28 | NCA | Nippon Cargo Airlines | | J | TRAFFIC |
| 29 | NCAB | NC TRUCKING LLC | | | SCAC4 |
| 30 | NCAC | NORGREN, C A CO/DETROIT DIVISION | | | SCAC3 |
| 31 | NCAG | NEWMAN CARTAGE INC | | | SCAC3 |
| 32 | NCAG | NORTH 49 TRUCKLINES INC | | | SCAC4 |
| 33 | NCAI | NCA TRANSPORT INC | | | SCAC4 |
| 34 | NCAL | NORWEGIAN CARIBBEAN LINES | | | PWRC |
| 35 | NCAL | NOR-CAL MOVING SERVICES | | | SCAC4 |
| 36 | NCAN | Incan Superior Ltd. | 1/1975-1/1980 | | NAKINA |
| 37 | NCAN | Incan Superior Ltd. | 1/75-1/80 | | NRHS |
| 38 | NCAN | RETIRED 11-24-92 ATP (0356) [INCAN SUPERIOR LTD.] | | | PWRC |
| 39 | NCAN | Incan Superior | | | RSRV |
| 40 | NCAO | NOVAJO CARRIERS | | | SCAC4 |
| 41 | NCAQ | NCA TRUCKING | | | SCAC3 |
| 42 | NCAQ | NATIONAL OIL & BURNER COMPANY | | | SCAC4 |
| 43 | NCAR | Nuevo Central Argentina | Real: NCA | RA | TRAFFIC |
| 44 | NCAS | NEW CASTLE TRAVEL SERVICE | | | SCAC3 |
| 45 | NCAS | NORTHERN CASCADE DOOR & | | | SCAC4 |
| 46 | NCAT | NACA TRUCKING CO | | | SCAC3 |
| 47 | NCAU | COLONIAL / ATL (BERMUDA) LTD. | | | PWRC |
| 48 | NCAU | COLONIAL/ATL (BERMUDA) LTD. | | | SCAC3 |
| 49 | NCAZ | NCA LEASING COMPANY/DIV. G.H. LEASING CORPORATION | | | PWRC |
| 50 | NCAZ | NCA Leasing | | | RSRV |
| 51 | NCAZ | NCA LEASING COMPANY/DIV G H LEASING | | | SCAC4 |
| 52 | NCB | North Caribou Flying Service Ltd. | Callsign: North Caribou, | CDN | AVCODES |
| 53 | NCB | North Caribou Flying Service Ltd | | | ICAO1 |
| 54 | NCB | Nevada Copper Belt Ry. | 4/1938 | | NAKINA |
| 55 | NCB | Nevada Copper Belt R.R. | 1/1941-1/1946 | | NAKINA |
| 56 | NCB | Nevada Copper Belt R.R. Co. | 7/1923-7/1936 | | NAKINA |
| 57 | NCB | Nevada Copper Belt Ry. | Apr-38 | | NRHS |
| 58 | NCB | NEVADA COPPER BELT RWY. | | | PWRC |
| 59 | NCB | Nevada Copper Belt Ry. | | USA | TRAFFIC |
| 60 | NCBB | NORTH CARIBBEAN SHIPPING CO. LTD. | | | SCAC3 |
| 61 | NCBC | N C B C BUS SERVICE | | | SCAC3 |
| 62 | NCBD | NOVO CARGO SERVICES LTD | | | SCAC3 |
| 63 | NCBL | NORELCO CABINETS 1989 LTD | | | SCAC4 |
| 64 | NCBP | NATIONAL CROSS BORDER XPRESS LLC | | | SCAC4 |
| 65 | NCBT | NATIVE COWBOY TRUCKING | | | SCAC4 |
| 66 | NCBU | NORTHBROOK CONTAINER LEASING | | | PWRC |
| 67 | NCBU | Northbrook Container Leasing | | | RSRV |
| 68 | NCBU | NORTHBROOK CONTAINER LEASING | | | SCAC3 |
| 69 | NCBU | NORTHBROOK CONTAINER LEASING | | | SCAC4 |
| 70 | NCBX | NEW CENTURY RAIL TRANSPOR LLC | | | SCAC4 |
| 71 | NCC | North Coast Air Services Ltd. | Callsign: North Coast, | CDN | AVCODES |
| 72 | NCC | T3 Aviation, Inc. | Callsign: Starfleet, | USA | AVCODES |
| 73 | NCC | North Coast Air Services Ltd | | | ICAO1 |
| 74 | NCCA | NORTH COAST CARTAGE INC | | | SCAC3 |
| 75 | NCCA | NATURAL CHEMISTRY CANADA INC | | | SCAC4 |
| 76 | NCCB | NATIONAL CARGO CARRIER | | | SCAC4 |
| 77 | NCCC | NORTH CENTRAL CONSTRUCTORS CO | | | SCAC3 |
| 78 | NCCD | NEDIMAR CHARTER CORPORATION | | | SCAC4 |
| 79 | NCCE | NORTH CENTRAL COOP | | | SCAC4 |
| 80 | NCCF | NCC FOODS CORPORATION FLEET | | | SCAC3 |
| 81 | NCCG | NORTHEAST CARGO CARRIERS LLC | | | SCAC4 |
| 82 | NCCI | NORTH CHINA CARGO SERVICE INC | | | SCAC4 |
| 83 | NCCJ | N C C TRANSPORT INC | | | SCAC4 |
| 84 | NCCL | NATIONAL CARLOADING CORPORATION | | | SCAC3 |
| 85 | NCCL | NISKO CARGO CONSOLIDATION LTD | | | SCAC4 |
| 86 | NCCM | NAIRN CENTRE CORPORATION COMPANY LT | | | SCAC3 |
| 87 | NCCM | NEWMAC MFG INC | | | SCAC4 |
| 88 | NCCN | NYKCOS CAR CARRIER COMPANY LIMITED | | | SCAC4 |
| 89 | NCCO | NICKELS CARTAGE CO LTD | | | SCAC3 |
| 90 | NCCO | NOVA CRAFT CANOE | | | SCAC4 |
| 91 | NCCP | NORTH COAST COOPERATIVE INC | | | SCAC3 |
| 92 | NCCQ | NOVA CONSTRUCTION CO LTD | | | SCAC4 |
| 93 | NCCR | NORTH COAST CARTAGE INC | | | SCAC4 |
| 94 | NCCS | NEW CASTLE COLD STORAGE TRANSPORTAT | | | SCAC3 |
| 95 | NCCS | NEW CASTLE COLD STORAGE TRANSPORTAT | | | SCAC4 |
| 96 | NCCT | NATIONAL ELECTRONIC TRANSPORT INC | | | SCAC3 |
| 97 | NCCT | NATIONAL ELECTRONIC TRANSPORT INC | | | SCAC4 |
| 98 | NCCU | NIPPON CONCEPT CORPORATION | | J | BIC |
| 99 | NCCU | NORTH CHESCHIRE CONTAINERS, LTD | | | SCAC3 |
| 100 | NCCU | NIPPON CONCEPT CORPORATION | | | SCAC4 |
