| 1 | CN | Islands Nationair | Designator CN* reinstated by IATA. Commenced operations in 1984. | PNG | AVCODES |
| 2 | CN | Torosair | ICAO: TAU, Callsign: Torair, Ceased operations during 1990 | TR | AVCODES |
| 3 | CN | Craft Airlines Ltd. | Callsign: Craft, | CR | AVCODES |
| 4 | CN | CEGA Aviation Limited | ICAO: CEG, Callsign: Cega, Designator CN recalled by IATA | GB | AVCODES |
| 5 | CN | Grand China Air Co., Ltd. | ICAO: GDC, Callsign: Grand China, IATA Prefix: 895, | PRC | AVCODES |
| 6 | CN | Westward Airways, Inc. | ICAO: WWD, Callsign: Westward, Established in 2002 and started operations on 01 June 2004. Ceased operations on 25 July 2005. | USA | AVCODES |
| 7 | CN | Canadian National Rys. | 7/1930-7/2005 | | NAKINA |
| 8 | CN | Canadian Northern Ry. (Canadian National Rys.) | 8/1920-7/1923 | | NAKINA |
| 9 | CN | Canadian Northern Ry. (Canadian National Rys.) | 23-Jul | | NRHS |
| 10 | CN | Canadian National Rys. | 4/38-7/2000 | | NRHS |
| 11 | CN | CANADIAN NATIONAL RWY - NORTH AMERICA [CANADIAN NORTHERN RY.] | | | PWRC |
| 12 | CN | Canadian National Railway | | | RSRV |
| 13 | CN | CANADIAN NATIONAL RAILWAYS | | | SCAC4 |
| 14 | CN | Canadian National Railway | Real: CNR | CDN | TRAFFIC |
| 15 | CN | CargoNet AS | | NO | VKM |
| 16 | CNA | Centennial Airlines, S.A. | IATA: BE, Callsign: Cannon, Ceased operations in 1996. Founded in 1991 | E | AVCODES |
| 17 | CNA | Centavia | IATA: 7N, Suspended operations on 26 October 2006. | SR | AVCODES |
| 18 | CNA | Canavia Líneas Aéreas, SLU | Callsign: Canavia, Founded in July 2009. | E | AVCODES |
| 19 | CNA | Centavia | IATA: 7N | | ICAO1 |
| 20 | CNA | Canadian National Rys. | 1/1975-7/2005 | | NAKINA |
| 21 | CNA | Canadian National Rys. | 1/75-7/2000 | | NRHS |
| 22 | CNA | CANADIAN NATIONAL RWY | | | PWRC |
| 23 | CNA | Canadian National Railway | | | RSRV |
| 24 | CNAA | CANATA, ROBERT TRUCKING | | | SCAC3 |
| 25 | CNAC | CINCINNATI AIR CARGO INC | | | SCAC3 |
| 26 | CNAD | CANADIAN TRUNK LINE | | | SCAC3 |
| 27 | CNAD | CAMIONNAGE ADM INC | | | SCAC4 |
| 28 | CNAE | CANAAN ENTERPRISES | | | SCAC3 |
| 29 | CNAF | CONTRACTORS TRANSPORT INC | | | SCAC4 |
| 30 | CNAG | CONTINENTAL NORTH ATLANTIC WESTBOUN | | | SCAC3 |
| 31 | CNAG | CNA LOGISTICS LTD | | | SCAC4 |
| 32 | CNAH | CON AFFAIR LTD, THE | | | SCAC3 |
| 33 | CNAH | CNA FREIGHT LLC | | | SCAC4 |
| 34 | CNAI | C&A TRUCKING | | | SCAC3 |
| 35 | CNAI | C & A TRUCKING | | | SCAC4 |
| 36 | CNAJ | CONTINENTAL ARMORED TRANSPORT INC | | | SCAC3 |
| 37 | CNAJ | CENTRAL STEEL BUILDING & CONSTRUCTI | | | SCAC4 |
| 38 | CNAK | C & A TRUCKING INC | | | SCAC3 |
| 39 | CNAK | C N A TRUCKING INC | | | SCAC4 |
| 40 | CNAL | CNAN LINES | | | SCAC4 |
| 41 | CNAM | CIRCLE NORTH AMERICAN MOVING & STOR | | | SCAC3 |
| 42 | CNAM | CAN AM RV | | | SCAC4 |
| 43 | CNAN | CONAN TRANSPORT | | | SCAC4 |
| 44 | CNAO | CASEY-NORTH AMERICAN MOVING & STORA | | | SCAC3 |
| 45 | CNAP | CAN AM RAPID COURIER INC | | | SCAC3 |
| 46 | CNAP | COLIN, AUDELIO RAFAEL | | | SCAC4 |
| 47 | CNAQ | CANNONBALL EXPRESS INC | | | SCAC3 |
| 48 | CNAQ | CANNONBALL EXPRESS TRANSPORTATION C | | | SCAC4 |
| 49 | CNAR | CRANE & RUSSAK CO INC | | | SCAC3 |
| 50 | CNAR | CRANE & RUSSAK CO INC | | | SCAC4 |
| 51 | CNAS | CONDOR AIR-SEA TRANSPORT | | | SCAC3 |
| 52 | CNAT | CANADIAN NATIONAL AQUATRAIN | | | PWRC |
| 53 | CNAT | CN AQUATRAIN | | | SCAC4 |
| 54 | CNAU | TECHNIC-FRANCE | | F | BIC |
| 55 | CNAU | TECHNIC-FRANCE | | | SCAC4 |
| 56 | CNAV | COLUMBIA NORTH AMERICAN VAN & STORA | | | SCAC3 |
| 57 | CNAV | COLUMBIA NORTH AMERICAN VAN & STORA | | | SCAC4 |
| 58 | CNAW | CENTRAL TRANSPORTATION SERVICES INC | | | SCAC3 |
| 59 | CNAW | CENTRAL TRANSPORTATION SERVICES INC | | | SCAC4 |
| 60 | CNAY | C & A LEASING INC | | | SCAC3 |
| 61 | CNAZ | CANADIAN NATIONAL RWY [GRAND TRUNK WESTERN RAILROAD INC.] | | | PWRC |
| 62 | CNAZ | Canadian National Railway | | | RSRV |
| 63 | CNAZ | GRAND TRUNK WESTERN RAILROAD | | | SCAC4 |
| 64 | CNB | Air Columbus | IATA: BO, Callsign: Air Columbus, Ceased operations | P | AVCODES |
| 65 | CNB | Cityline Hungary Kft. | IATA: ZM, Callsign: Cityhun, Ceased operation during 2015. Designator ZM* recalled by IATA. | H | AVCODES |
| 66 | CNB | Cityline Hungary | | | ICAO1 |
| 67 | CNB | | | NL | TRAFFIC |
| 68 | CNBA | CBASE | | | SCAC4 |
| 69 | CNBB | CON-BROOK TRANSPORTATION, INC | | | SCAC3 |
| 70 | CNBC | C & B CONTRACT CARRIERS INC | | | SCAC3 |
| 71 | CNBD | C & B TRANSPORTATION INC | | | SCAC3 |
| 72 | CNBE | COLLINS, BILL OIL CO INC | | | SCAC4 |
| 73 | CNBH | CAREY/NOB HILL LIMOUSINE AND TORUS | | | SCAC3 |
| 74 | CNBH | CN TRANSPORT LIMITED | | | SCAC4 |
| 75 | CNBI | CONRAD & BISCHOFF INC | | | SCAC3 |
| 76 | CNBJ | C & B TOURS | | | SCAC3 |
| 77 | CNBJ | CARTER TRUCKING | | | SCAC4 |
| 78 | CNBK | C & B TRUCKING | | | SCAC3 |
| 79 | CNBL | CANNONBALL TRUCKING INC | | | SCAC3 |
| 80 | CNBL | CANNONBALL TRUCKING INC | | | SCAC4 |
| 81 | CNBM | C & B TRANSFER & STORAGE CO | | | SCAC3 |
| 82 | CNBM | CAIN & BULTMAN INC | | | SCAC4 |
| 83 | CNBN | CONTINENTAL BROKERAGE INC | | | SCAC3 |
| 84 | CNBN | CALDRAYAGE TRANSPORTATION INC | | | SCAC4 |
| 85 | CNBO | CANADAS BEST CARRIERS INC | | | SCAC3 |
| 86 | CNBO | CASTILLON BROS COMPANY | | | SCAC4 |
| 87 | CNBP | C & B TRANSPORT | | | SCAC3 |
| 88 | CNBP | CARTER TRANSPORTATION INC | | | SCAC4 |
| 89 | CNBQ | C & B TRUCKING INC | | | SCAC3 |
| 90 | CNBQ | CONSORCIO DE SERVICIOS INTERNACIONA | | | SCAC4 |
| 91 | CNBR | CARIBBEAN NEW BRUNSWICK | | | SCAC3 |
| 92 | CNBS | CANOGA BUILDERS SUPPLIES | | | SCAC3 |
| 93 | CNBV | COLLINS BUS SERVICE INC | | | SCAC3 |
| 94 | CNBV | COLLINS BUS SERVICE INC | | | SCAC4 |
| 95 | CNBW | CANTONS BESTWAY INC | | | SCAC3 |
| 96 | CNBY | CANTERBURY TRAVEL | | | SCAC3 |
| 97 | CNC | Corporacion Aereo Cencor, S.A. de C.V. | Callsign: Cencor, | MEX | AVCODES |
| 98 | CNC | Corporacion Aereo Cencor | | | ICAO1 |
| 99 | CNCB | C & C DISTRIBUTORS | | | SCAC3 |
| 100 | CNCB | CNC CUSTOM MACHINING & FABRICATING | | | SCAC4 |
