| 11701 | CNXB | CANEX INC | | | SCAC4 |
| 11702 | CNXB | Connex bus UK | | GB | TRAFFIC |
| 11703 | CNXC | CONTRAX CARRIER COMPANY | | | SCAC3 |
| 11704 | CNXDK | Connex Denmark | | DK | TRAFFIC |
| 11705 | CNXE | COTTON EXPRESS INC | | | SCAC3 |
| 11706 | CNXF | CUTINO TRANSPORT CORP | | | SCAC4 |
| 11707 | CNXG | CAROLINAS EXPRESS INC | | | SCAC4 |
| 11708 | CNXI | CONTAINER EXPRESS INC | | | SCAC4 |
| 11709 | CNXJ | CONCORD EXPRESS | | | SCAC4 |
| 11710 | CNXK | CONN XPRESS | | | SCAC3 |
| 11711 | CNXK | CANIMEX INC | | | SCAC4 |
| 11712 | CNXL | C N X | | | SCAC3 |
| 11713 | CNXL | CONTAINER EXPRESS LLC | | | SCAC4 |
| 11714 | CNXM | CANADIAN NATIONAL RAILWAYS EXPRESS | | | SCAC3 |
| 11715 | CNXM | CENEX OF MINOT | | | SCAC4 |
| 11716 | CNXN | CENTRAL EXPRESS INC | | | SCAC3 |
| 11717 | CNXN | CONTAINER X INC | | | SCAC4 |
| 11718 | CNXP | CONTINENTAL EXPEDITERS | | | SCAC3 |
| 11719 | CNXQ | CONTAINER EXPRESS INC | | | SCAC4 |
| 11720 | CNXS | CARLS NIAGARA TAXI SERVICE | | | SCAC3 |
| 11721 | CNXS | CORNEJO EXPRESS | | | SCAC4 |
| 11722 | CNXT | CONEX FREIGHT SYSTEMS INC | | | SCAC3 |
| 11723 | CNXT | CONNECTION TRANSPORT LLC | | | SCAC4 |
| 11724 | CNXU | IFREMER | | F | BIC |
| 11725 | CNXU | CENTER NATIONAL POUR L'EXPLOITATION | | | SCAC3 |
| 11726 | CNXU | IFREMER | | | SCAC4 |
| 11727 | CNXV | CONARD EXCAVATING | | | SCAC3 |
| 11728 | CNXV | CHAMPION TRANSIT LLC | | | SCAC4 |
| 11729 | CNXW | COSTA RICAN TRANSPORT | | | SCAC4 |
| 11730 | CNXW | Connex Warsawa | | PL | TRAFFIC |
| 11731 | CNXY | CORNBREAD X-PRESS INC | | | SCAC4 |
| 11732 | CNY | Central Airways Limited | Callsign: Central Leone, | WAL | AVCODES |
| 11733 | CNY | Central Airways | | | ICAO1 |
| 11734 | CNY | *CENTRAL NEW YORK CHAPTER NATIONAL RAILROAD HISTORICAL SOCIETY,INC | | | PWRC |
| 11735 | CNY | *CENTRAL NEW YOUR RAILWAY CO. | | | PWRC |
| 11736 | CNYC | CNY CENTRO INC | | | SCAC3 |
| 11737 | CNYC | CANEY CREEK PUBLISHING INC | | | SCAC4 |
| 11738 | CNYG | CANTY TRUCKING INC | | | SCAC3 |
| 11739 | CNYG | CARNABY SHIPPING COMPANY LIMITED | | | SCAC4 |
| 11740 | CNYH | COONEY TRANSPORT LTD | | | SCAC4 |
| 11741 | CNYI | CITY OF NEW YORK | | | SCAC3 |
| 11742 | CNYI | CANARY INC | | | SCAC4 |
| 11743 | CNYK | Central New York R.R. Corp. | 7/2005 | | NAKINA |
| 11744 | CNYK | The New York, Susquehanna and Western Ry. Corp. | eliminated 4/1996 | | NAKINA |
| 11745 | CNYK | Central New York R.R. Corp. | added 4/1974; 1/1975 | | NAKINA |
| 11746 | CNYK | Central New York R.R. Corp. | Jan-75 | | NRHS |
| 11747 | CNYK | Central New York R.R. Corp. | added 4/74 | | NRHS |
| 11748 | CNYK | The New York, Susquehanna and Western Ry. Corp. | eliminated 4/96 | | NRHS |
| 11749 | CNYK | CENTRAL NEW YORK RAILROAD CORP. (NEW YORK, SUSQUEHANNA & WESTERN RWY. CORP.) | | | PWRC |
| 11750 | CNYK | Central New York Railroad | | | RSRV |
| 11751 | CNYK | CENTRAL NEW YORK RAILROAD CORPORATI | | | SCAC3 |
| 11752 | CNYK | CENTRAL NEW YORK RAILROAD CORPORATI | | | SCAC4 |
| 11753 | CNYL | C & Y TRANSPORTATION COMPANY INC | | | SCAC3 |
| 11754 | CNYL | COUNTY LIME LTD | | | SCAC4 |
| 11755 | CNYM | COUNTRY MILE TRANSPORT | | | SCAC3 |
| 11756 | CNYO | C & Y OIL CO INC | | | SCAC4 |
| 11757 | CNYP | CONOY TRUCKING INC | | | SCAC3 |
| 11758 | CNYR | CENTRAL NEW YORK RAILWAY CO. | | | PWRC |
| 11759 | CNYR | CNY TRUCKING | | | SCAC3 |
| 11760 | CNYR | CORNERSTONE RACK & TOOLING | | | SCAC4 |
| 11761 | CNYS | Central New York Southern R.R. Corp. | 7/1923 | | NAKINA |
| 11762 | CNYS | Central New York Southern R.R. Corp. | 23-Jul | | NRHS |
| 11763 | CNYS | CENTRAL NEW YORK SOUTHERN RR CORP. | | | PWRC |
| 11764 | CNYS | CORNEY TRANSPORTATION INC | | | SCAC4 |
| 11765 | CNYT | CONWAY TRANSPORTATION SERVICE | | | SCAC3 |
| 11766 | CNYV | COUNTRY VINTNER INC, THE | | | SCAC4 |
| 11767 | CNYW | PITTSBURG SHAWMUT & NORTHERN RR [CENTRAL NEW YORK & WESTERN RR] | | | PWRC |
| 11768 | CNYX | Central New York Locomotive Co. | 7/2005 (not listed) | | NAKINA |
| 11769 | CNYX | Central New York R.R. Corp. | 1/1994 | | NAKINA |
| 11770 | CNYX | Central New York R.R. Corp. (transferred to New York, Susquehanna and Western Ry. Corp.) | added 10/1988 | | NAKINA |
| 11771 | CNYX | Central New York R.R. Corp. | 1/1980; eliminated 10/1988 | | NAKINA |
| 11772 | CNYX | Central New York R.R. Corp. | 1/80; eliminated 10/88 | | NRHS |
| 11773 | CNYX | Central New York R.R. Corp. (transferred to New York, Susquehanna and Western Ry. Corp.) | added 10/88 | | NRHS |
| 11774 | CNYX | Central New York R.R. Corp. | Jan-94 | | NRHS |
| 11775 | CNYX | *CENTRAL NEW YORK RAILROAD CORP. (NEW YORK, SUSQUEHANNA & WESTERN RWY. CORP.) | | | PWRC |
| 11776 | CNYX | *CENTRAL NEW YORK DINING CAR COMPANY | | | PWRC |
| 11777 | CNYX | +CENTRAL NEW YORK LOCOMOTIVE CO. | | | PWRC |
| 11778 | CNYX | Central New York Locomotive | | | RSRV |
| 11779 | CNYX | CENTRAL NEW YORK LOCOMOTIVE CO INC | | | SCAC4 |
| 11780 | CNYZ | CITY OF NEW YORK | | | PWRC |
| 11781 | CNZC | CONZEMIUS COMPANIES INC | | | SCAC4 |
| 11782 | CNZL | CONTINENTAL COURIER LIMITED | | | SCAC4 |
| 11783 | CNZN | COMPAHIA NACAL DE NAVEGA'AO | | | SCAC3 |
| 11784 | CNZN | CONDON TRANSPORTATION INCORPORATED | | | SCAC4 |
| 11785 | CNZO | CENZO INC | | | SCAC3 |
| 11786 | CNZR | Central New England R.R. Co., Inc. | 7/2000-7/2005; added 7/2008 | | NAKINA |
| 11787 | CNZR | Central New England R.R. Co., Inc. | Jul-00 | | NRHS |
| 11788 | CNZR | CENTRAL NEW ENGLAND RAILROAD CO. | | | PWRC |
| 11789 | CNZR | Central New England Railroad | | | RSRV |
| 11790 | CNZR | CENTRAL NEW ENGLAND RAILROAD COMPAN | | | SCAC3 |
| 11791 | CNZR | CENTRAL NEW ENGLAND RAILROAD CO INC | | | SCAC4 |
| 11792 | CNZT | CARRIER NATIONWIDE TRANSPORTATION S | | | SCAC3 |
| 11793 | CNZT | CARRIER NATIONWIDE TRANSPORTATION S | | | SCAC4 |
| 11794 | CNZU | A1 CONTAINERS NZ LIMITED | | NZ | BIC |
| 11795 | CO | Continental Air Lines, Inc. | ICAO: COA, Callsign: Continental, IATA Prefix: 005, Name changed to Continental Airlines, Inc. | USA | AVCODES |
| 11796 | CO | Continental Airlines, Inc. | ICAO: COA, Callsign: Continental, IATA Prefix: 005, Merged into United Airlines UA/UAL. Name changed from Continental Air Lines, Inc. | USA | AVCODES |
| 11797 | CO | Cobaltair Limited t/a Cobaltair | ICAO: FCB, Callsign: New Age, ICAO callsign changed to Apollo. | CY | AVCODES |
| 11798 | CO | Cobaltair Limited t/a Cobaltair | ICAO: FCB, Callsign: Apollo, Ceased operations on 18 October 2018. Entered voluntary liquidation on 19 December 2018. ICAO callsign changed from New Age. | CY | AVCODES |
| 11799 | CO | North-Western Cargo International Airlines Co., Ltd. | ICAO: CNW, Callsign: Tang, IATA Prefix: 966, Established in 2016. | PRC | AVCODES |
| 11800 | CO | CSX Transportation, Inc. | added 10/1987; 1/1994-7/2005 | | NAKINA |
