| 1 | CH | Bemidji Airlines | ICAO: BMJ, Callsign: Bemidji, IATA Prefix: 872, | USA | AVCODES |
| 2 | CH | Chicago Air, Inc. | ICAO: CGO, Callsign: Wild Onion, | USA | AVCODES |
| 3 | CH | Binter Mediterraneo, S.A. | ICAO: BIM, IATA designator changed to AX* | E | AVCODES |
| 4 | CH | Chicago Helicopter Airways, Inc. | Callsign: Chicago Airways, | USA | AVCODES |
| 5 | CH | Cavei Avir Lemitanim t/a Cargo Air Lines | ICAO: ICL, Callsign: Cal, Designator CH recalled by IATA | IL | AVCODES |
| 6 | CH | Other railway vehicles | | CH | TRAFFIC |
| 7 | CH | Chemins de Fer Hellénique | | EL | VKM |
| 8 | CH&G | Chicago, Harvard & Geneva Lake Ry. Co. | 7/1923-7/1930 | | NAKINA |
| 9 | CH&G | Chicago, Harvard & Geneva Lake Ry. Co. | 23-Jul | | NRHS |
| 10 | CH&G | CHICAGO, HARVARD & GENEVA LAKE RWY. CO. | | | PWRC |
| 11 | CHA | Chiltern Airways | Callsign: Cavalier, | GB | AVCODES |
| 12 | CHA | Central Flying Service, Inc. | Callsign: Charter Central, | USA | AVCODES |
| 13 | CHA | Central Flying Service | | | ICAO1 |
| 14 | CHA | Swiss army | | CH | TRAFFIC |
| 15 | CHAA | CHADDERTON TRUCKING INC | | | SCAC3 |
| 16 | CHAA | CHADDERTON TRUCKING INC | | | SCAC4 |
| 17 | CHAB | | City: Chabarovsk | SU | TRAFFIC |
| 18 | CHAD | CHADBOURNE, DOUG & SON TRUCKING | | | SCAC4 |
| 19 | CHAE | CHATHAM BIOTEC LTD | | | SCAC4 |
| 20 | CHAG | CHAGENTS INC | | | SCAC3 |
| 21 | CHAH | CHALLENGER FREIGHTWAYS | | | SCAC3 |
| 22 | CHAH | CHAHAL TRUCKING | | | SCAC4 |
| 23 | CHAI | CH-AN INC | | | SCAC3 |
| 24 | CHAI | CHACHIES SALSA & SANTA BARBARA SALS | | | SCAC4 |
| 25 | CHAJ | CHAMPS MUSHROOMS INC | | | SCAC4 |
| 26 | CHAL | CHALUT TRANSPORT (1974) INC | | | SCAC3 |
| 27 | CHAL | CHALLENGE LOGISTICS | | | SCAC4 |
| 28 | CHAM | CHI-AM MOTOR COACH INC | | | SCAC3 |
| 29 | CHAN | CHAN, LINCOLN | | | SCAC3 |
| 30 | CHAN | CHANDRIS (HELLAS) INC | | | SCAC4 |
| 31 | CHAND | Chilean Transandine | | RCH | TRAFFIC |
| 32 | CHANG | Changchun Subway | | PRC | TRAFFIC |
| 33 | CHAO | CALLAHAN COMPANY, THE | | | SCAC3 |
| 34 | CHAP | CHAMBERS MOVING & STORAGE CO | | | SCAC3 |
| 35 | CHAP | CHAPIN LOGISTICS INC | | | SCAC4 |
| 36 | CHAQ | CHAMBERS-THOMPSON MOVING & STORAGE | | | SCAC3 |
| 37 | CHAQ | CHALER CORPORATION | | | SCAC4 |
| 38 | CHAR | CHARIOT EXPRESS INC | | | SCAC4 |
| 39 | CHARLB | Charlesbourg Bus Company | | CDN | TRAFFIC |
| 40 | CHART | Charterways Transportation | | CDN | TRAFFIC |
| 41 | CHAS | CHANDLERS AUTO EXPRESS | | | SCAC3 |
| 42 | CHAT | Chattahoochee Bay R.R. Co., Inc. | added 10/2006 | | NAKINA |
| 43 | CHAT | Chattahoochee & Gulf R.R. Co., Inc. | added 10/2003; 7/2005; eliminated 10/2006 | | NAKINA |
| 44 | CHAT | *CHATEAUGAY RAILROAD | | | PWRC |
| 45 | CHAT | +CHATTAHOOCHEE BAY RAILROAD CO., INC. [CHATTAHOOCHIE & GULF RR CO.} | | | PWRC |
| 46 | CHAT | Chattahoochee and Gulf Railroad | | | RSRV |
| 47 | CHAT | CHARTIER, M L INC | | | SCAC3 |
| 48 | CHAT | CHATTAHOOCHEE BAY RAILROAD INC | | | SCAC4 |
| 49 | CHAT | Chatham Transit (Ontario) | | CDN | TRAFFIC |
| 50 | CHAU | COMBINED TRANSPORT GROUP, INC. | | | PWRC |
| 51 | CHAU | Combined Transport Group | | | RSRV |
| 52 | CHAU | COMBINED TRANSPORT GROUP | | | SCAC3 |
| 53 | CHAU | CHARIOT INTERMODAL INC | | | SCAC4 |
| 54 | CHAV | CHAMP, LEE E | | | SCAC3 |
| 55 | CHAV | CHAVEZ VELAZCO, ARTURO | | | SCAC4 |
| 56 | CHAW | CHATHAM TRUCKING LLC | | | SCAC4 |
| 57 | CHAX | Chartrand's Tank Car Service, Inc. | added 10/1958; 4/1961-7/2000; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 58 | CHAX | Chartrand's Tank Car Service | added 4/1958; eliminated 10/1958 | | NAKINA |
| 59 | CHAX | Chartrand's Tank Car Rentals | added 1/1958; eliminated 4/1958 | | NAKINA |
| 60 | CHAX | Chartrand's Tank Car Service | added 7/1953; 7/1954-10/1957; eliminated 1/1958 | | NAKINA |
| 61 | CHAX | John W. Chartrand (Chartrand's Traffic Service) | 4/1947-1/1952; eliminated 7/1953 | | NAKINA |
| 62 | CHAX | John W. Chartrand (Chartrand's Traffic Service) | Jan-52 | | NRHS |
| 63 | CHAX | Chartrand's Tank Car Service | 10/57; eliminated 1/58 | | NRHS |
| 64 | CHAX | Chartrand's Tank Car Rentals | added 1/58; eliminated 10/58 | | NRHS |
| 65 | CHAX | Chartrand's Tank Car Service, Inc. | added 10/58; 4/61-7/2000 | | NRHS |
| 66 | CHAX | *CHARLOTTE SOUTHERN RAILROAD | | | PWRC |
| 67 | CHAX | +CHARTRAND'S TANK CAR SERVICE, INC. | | | PWRC |
| 68 | CHAX | Chartrand's Tank Car Service | | | RSRV |
| 69 | CHAX | CHARTRANDS TANK CAR SERVICE INC | | | SCAC3 |
| 70 | CHAX | Chartrand's Tank Car Service, Inc. | | USA | TRAFFIC |
| 71 | CHAZ | CHAMPION AUTOMOTIVE | | | PWRC |
| 72 | CHB | Airline Chelyabinsk Air Enterprise Joint Stock Company | IATA: H6, Callsign: Cheravia, | RUS | AVCODES |
| 73 | CHB | China West Air Ltd. | IATA: PN, Callsign: West China, IATA Prefix: 847, Designator PN instated by IATA | PRC | AVCODES |
| 74 | CHBA | CHICO, B A MARINE SERVICE INC | | | SCAC3 |
| 75 | CHBB | CHARNER BUS CORP | | | SCAC3 |
| 76 | CHBB | CHAMPLAIN VALLEY PLUMBING & HEATING | | | SCAC4 |
| 77 | CHBC | CHARLES BLUESTONE COMPANY | | | SCAC3 |
| 78 | CHBE | CHAMBERS TRUCKING | | | SCAC3 |
| 79 | CHBF | CHAM BANA TRUCKING | | | SCAC3 |
| 80 | CHBG | CHEMICAL BARGE CO | | | SCAC3 |
| 81 | CHBH | CHINOOK BUS TOURS | | | SCAC3 |
| 82 | CHBH | CHAMBERS, ISAAC CORDILL | | | SCAC4 |
| 83 | CHBI | CHAPP & BUSHEY OIL CO | | | SCAC4 |
| 84 | CHBJ | CHOUINARD, LEON | | | SCAC4 |
| 85 | CHBK | CHICAGO BULK SALES & LEASING CO | | | SCAC3 |
| 86 | CHBK | CBSL TRANSPORTATION SERVICES INC | | | SCAC4 |
| 87 | CHBL | CHAMBERS LEASING SYSTEMS INC | | | SCAC3 |
| 88 | CHBL | CHAMBERS LEASING SYSTEMS INC | | | SCAC4 |
| 89 | CHBM | CHRABOLOWSKI, JOHN MOVING & STORAGE | | | SCAC3 |
| 90 | CHBN | CHALLENGER PETROLEUM TRANSPORTATION | | | SCAC4 |
| 91 | CHBP | CHARLESTON HARBOR XPRESS (CHX) INC | | | SCAC4 |
| 92 | CHBS | CHAMBERS TRANSPORT INC | | | SCAC3 |
| 93 | CHBS | CHAHAL BROTHERS TRUCKING LTD | | | SCAC4 |
| 94 | CHBT | CABLE TRANSPORT INC | | | SCAC3 |
| 95 | CHBT | CABLE TRANSPORT INC | | | SCAC4 |
| 96 | CHBU | LAUENBRUCH GMBH | | | SCAC3 |
| 97 | CHBV | CHAMBLEE VETS TRANSPORT | | | SCAC3 |
| 98 | CHBV | CHAULK MOUND TROUT RANCH | | | SCAC4 |
| 99 | CHBW | CHAFEN BODY WORKS INC | | | SCAC3 |
| 100 | CHBW | CHALLENGER ENT LTD | | | SCAC4 |
