| 1 | CNO | Aerolineas Comerciales Del Norte, S.A. de C.V. | Callsign: Lineas Norte, | MEX | AVCODES |
| 2 | CNO | SAS Braathens AS | IATA: BU, Callsign: Scanor, IATA Prefix: 154, Integrated into mainline SAS 01 June 2007. Name changed from Braathens ASA. ICAO designator changed from BRA. ICAO callsign changed from Braathens. Formerly Braathens South American and Far East Airtransport A/S | N | AVCODES |
| 3 | CNO | SAS Braathens | IATA: SK | | ICAO1 |
| 4 | CNO | Canadian Northern Ontario Ry. (Canadian National Rys.) | 8/1920-7/1923 | | NAKINA |
| 5 | CNO | Canadian Northern Ontario Ry. (Canadian National Rys.) | 23-Jul | | NRHS |
| 6 | CNO | CANADIAN NNATIONAL RWY. [CANADIAN NORTHERN ONTARIO RWY.] | | | PWRC |
| 7 | CNOA | CENTENO, OSCAR A TRUCKING | | | SCAC3 |
| 8 | CNOB | CARR & ORMSBY TRANSPORT INC | | | SCAC3 |
| 9 | CNOC | CNS LOGISTICS INC | | | SCAC4 |
| 10 | CNOD | CARSONS OVERLAND TRUCKING INC | | | SCAC3 |
| 11 | CNOD | CNAN NORD SPA | | | SCAC4 |
| 12 | CNOE | CONDOR ENTERPRISES, INC | | | SCAC3 |
| 13 | CNOE | CONDOR ENTERPRISES INC | | | SCAC4 |
| 14 | CNOG | CANOGA TRANSPORTATION CO INC | | | SCAC3 |
| 15 | CNOG | CASINO NIAGARA | | | SCAC4 |
| 16 | CNOH | CANOOCHEE TRANSPORT INC | | | SCAC4 |
| 17 | CNOI | CRONIN OIL INC | | | SCAC3 |
| 18 | CNOI | COURIER NOW | | | SCAC4 |
| 19 | CNOJ | CANSCO LTD | | | SCAC4 |
| 20 | CNOK | CASTANEDA, GONZALO | | | SCAC3 |
| 21 | CNOK | CHINOOK TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 22 | CNOL | COLONIAL TRANSIT INC | | | SCAC3 |
| 23 | CNOM | CONNORS TRUCKING INC | | | SCAC3 |
| 24 | CNOO | C & N TRANSPORTATION CORPORATION | | | SCAC3 |
| 25 | CNOO | CANTOR LOGISTICS INC | | | SCAC4 |
| 26 | CNOP | CONSOCOMP LTD | | | SCAC3 |
| 27 | CNOP | COIN CO INTERNATIONAL PLC | | | SCAC4 |
| 28 | CNOQ | C & O DELIVERY SERVICE | | | SCAC3 |
| 29 | CNOQ | COMANORTE | | | SCAC4 |
| 30 | CNOR | Cincinnati Northern | 1/1975-7/2005 | | NAKINA |
| 31 | CNOR | *CANADIAN NATIONAL [CANADIAN NORTHERN RWY.] | | | PWRC |
| 32 | CNOR | +CINCINNATI NORTHERN RR [CONRAIL] | | | PWRC |
| 33 | CNOR | Cincinnati Northern | | | RSRV |
| 34 | CNOR | CINCINNATI NORTHERN | | | SCAC3 |
| 35 | CNOR | Cincinnati Northern Railway | Real: NOR | USA | TRAFFIC |
| 36 | CNOT | CANO LOGISTICS | | | SCAC4 |
| 37 | CNOU | CONCORD/NOPAL | | | SCAC3 |
| 38 | CNOV | CONTAINER OVERSEAS AGENCY & TERMINA | | | SCAC3 |
| 39 | CNOW | Columbia & Northern Ry. Co. | 7/2000-7/2005 | | NAKINA |
| 40 | CNOW | Columbia & Northern Ry. Co. | Jul-00 | | NRHS |
| 41 | CNOW | COLUMBIA & NORTHERN RAILWAY | | | PWRC |
| 42 | CNOW | Columbia and Northern Railway | | | RSRV |
| 43 | CNOW | COLUMBIA & NORTHERN RAILWAY CO | | | SCAC4 |
| 44 | CNOX | Shell Canada Ltd. | added 10/1963; 7/1965-1/1980; eliminated 10/1987 | | NAKINA |
| 45 | CNOX | Canadian Oil Cos. Ltd. | 7/1935-4/1961; eliminated 10/1963 | | NAKINA |
| 46 | CNOX | Canadian Oil Cos. Ltd. | 4/38-4/61 | | NRHS |
| 47 | CNOX | Shell Canada Ltd. | 7/65-1/80; eliminated 10/87 | | NRHS |
| 48 | CNOX | SHELL CANADA LTD. [CANADIAN OIL CO. LTD.] | | | PWRC |
| 49 | CNOX | Canadian Oil Co. (Shell Canada) | | | RSRV |
| 50 | CNOY | C & O TRUCKING | | | SCAC3 |
| 51 | CNOY | CORNELL ONLINE LLC | | | SCAC4 |
