| 6201 | CGY | Corporacion Paraguaya de Aeronautica S.A. | | PY | AVCODES |
| 6202 | CGY | Corporacion Paraguaya De Aeronautica | | | ICAO1 |
| 6203 | CGYC | COASTAL ENERGY CORPORATION | | | SCAC3 |
| 6204 | CGYI | CGRA INC | | | SCAC4 |
| 6205 | CGYL | CONTINENTAL TRANSPORTATION AGENCY L | | | SCAC3 |
| 6206 | CGYO | CONSOLIDATED ENERGY CO LLC | | | SCAC4 |
| 6207 | CGYP | COASTAL GLORY SHIPPING LIMITED | | | SCAC3 |
| 6208 | CGYS | COURSEY, GARY & SONS TRUCKING | | | SCAC3 |
| 6209 | CGYT | CALGARY TRAIL TRUCKING LTD | | | SCAC3 |
| 6210 | CGZ | Colorful GuiZhou Airlines Co., Ltd | IATA: GY, Callsign: Colorful, IATA Prefix: 661, Founded on 19 June 2015. Commenced operations on 31 December 2015. | PRC | AVCODES |
| 6211 | CGZH | COSCO GUANGZHOU | | | SCAC4 |
| 6212 | CGZL | CARGOZONE LOGISTICS INC | | | SCAC4 |
| 6213 | CGZT | CASTRO, GONZALO TORRES | | | SCAC4 |
| 6214 | CGZU | CAN TİCARET SANAYİ VE TIBBİ GAZLAR - HALUK ERŞAHİNOĞLU | | TR | BIC |
| 6215 | CGZU | FRACHT AG INTERNATIONAL TRANSPORTE | | | SCAC3 |
| 6216 | CGZU | FRACHT AG INTERNATIONAL TRANSPORTE | | | SCAC4 |
| 6217 | CH | Bemidji Airlines | ICAO: BMJ, Callsign: Bemidji, IATA Prefix: 872, | USA | AVCODES |
| 6218 | CH | Chicago Air, Inc. | ICAO: CGO, Callsign: Wild Onion, | USA | AVCODES |
| 6219 | CH | Binter Mediterraneo, S.A. | ICAO: BIM, IATA designator changed to AX* | E | AVCODES |
| 6220 | CH | Chicago Helicopter Airways, Inc. | Callsign: Chicago Airways, | USA | AVCODES |
| 6221 | CH | Cavei Avir Lemitanim t/a Cargo Air Lines | ICAO: ICL, Callsign: Cal, Designator CH recalled by IATA | IL | AVCODES |
| 6222 | CH | Other railway vehicles | | CH | TRAFFIC |
| 6223 | CH | Chemins de Fer Hellénique | | EL | VKM |
| 6224 | CH&G | Chicago, Harvard & Geneva Lake Ry. Co. | 7/1923-7/1930 | | NAKINA |
| 6225 | CH&G | Chicago, Harvard & Geneva Lake Ry. Co. | 23-Jul | | NRHS |
| 6226 | CH&G | CHICAGO, HARVARD & GENEVA LAKE RWY. CO. | | | PWRC |
| 6227 | CHA | Chiltern Airways | Callsign: Cavalier, | GB | AVCODES |
| 6228 | CHA | Central Flying Service, Inc. | Callsign: Charter Central, | USA | AVCODES |
| 6229 | CHA | Central Flying Service | | | ICAO1 |
| 6230 | CHA | Swiss army | | CH | TRAFFIC |
| 6231 | CHAA | CHADDERTON TRUCKING INC | | | SCAC3 |
| 6232 | CHAA | CHADDERTON TRUCKING INC | | | SCAC4 |
| 6233 | CHAB | | City: Chabarovsk | SU | TRAFFIC |
| 6234 | CHAD | CHADBOURNE, DOUG & SON TRUCKING | | | SCAC4 |
| 6235 | CHAE | CHATHAM BIOTEC LTD | | | SCAC4 |
| 6236 | CHAG | CHAGENTS INC | | | SCAC3 |
| 6237 | CHAH | CHALLENGER FREIGHTWAYS | | | SCAC3 |
| 6238 | CHAH | CHAHAL TRUCKING | | | SCAC4 |
| 6239 | CHAI | CH-AN INC | | | SCAC3 |
| 6240 | CHAI | CHACHIES SALSA & SANTA BARBARA SALS | | | SCAC4 |
| 6241 | CHAJ | CHAMPS MUSHROOMS INC | | | SCAC4 |
| 6242 | CHAL | CHALUT TRANSPORT (1974) INC | | | SCAC3 |
| 6243 | CHAL | CHALLENGE LOGISTICS | | | SCAC4 |
| 6244 | CHAM | CHI-AM MOTOR COACH INC | | | SCAC3 |
| 6245 | CHAN | CHAN, LINCOLN | | | SCAC3 |
| 6246 | CHAN | CHANDRIS (HELLAS) INC | | | SCAC4 |
| 6247 | CHAND | Chilean Transandine | | RCH | TRAFFIC |
| 6248 | CHANG | Changchun Subway | | PRC | TRAFFIC |
| 6249 | CHAO | CALLAHAN COMPANY, THE | | | SCAC3 |
| 6250 | CHAP | CHAMBERS MOVING & STORAGE CO | | | SCAC3 |
| 6251 | CHAP | CHAPIN LOGISTICS INC | | | SCAC4 |
| 6252 | CHAQ | CHAMBERS-THOMPSON MOVING & STORAGE | | | SCAC3 |
| 6253 | CHAQ | CHALER CORPORATION | | | SCAC4 |
| 6254 | CHAR | CHARIOT EXPRESS INC | | | SCAC4 |
| 6255 | CHARLB | Charlesbourg Bus Company | | CDN | TRAFFIC |
| 6256 | CHART | Charterways Transportation | | CDN | TRAFFIC |
| 6257 | CHAS | CHANDLERS AUTO EXPRESS | | | SCAC3 |
| 6258 | CHAT | Chattahoochee Bay R.R. Co., Inc. | added 10/2006 | | NAKINA |
| 6259 | CHAT | Chattahoochee & Gulf R.R. Co., Inc. | added 10/2003; 7/2005; eliminated 10/2006 | | NAKINA |
| 6260 | CHAT | *CHATEAUGAY RAILROAD | | | PWRC |
| 6261 | CHAT | +CHATTAHOOCHEE BAY RAILROAD CO., INC. [CHATTAHOOCHIE & GULF RR CO.} | | | PWRC |
| 6262 | CHAT | Chattahoochee and Gulf Railroad | | | RSRV |
| 6263 | CHAT | CHARTIER, M L INC | | | SCAC3 |
| 6264 | CHAT | CHATTAHOOCHEE BAY RAILROAD INC | | | SCAC4 |
| 6265 | CHAT | Chatham Transit (Ontario) | | CDN | TRAFFIC |
| 6266 | CHAU | COMBINED TRANSPORT GROUP, INC. | | | PWRC |
| 6267 | CHAU | Combined Transport Group | | | RSRV |
| 6268 | CHAU | COMBINED TRANSPORT GROUP | | | SCAC3 |
| 6269 | CHAU | CHARIOT INTERMODAL INC | | | SCAC4 |
| 6270 | CHAV | CHAMP, LEE E | | | SCAC3 |
| 6271 | CHAV | CHAVEZ VELAZCO, ARTURO | | | SCAC4 |
| 6272 | CHAW | CHATHAM TRUCKING LLC | | | SCAC4 |
| 6273 | CHAX | Chartrand's Tank Car Service, Inc. | added 10/1958; 4/1961-7/2000; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 6274 | CHAX | Chartrand's Tank Car Service | added 4/1958; eliminated 10/1958 | | NAKINA |
| 6275 | CHAX | Chartrand's Tank Car Rentals | added 1/1958; eliminated 4/1958 | | NAKINA |
| 6276 | CHAX | Chartrand's Tank Car Service | added 7/1953; 7/1954-10/1957; eliminated 1/1958 | | NAKINA |
| 6277 | CHAX | John W. Chartrand (Chartrand's Traffic Service) | 4/1947-1/1952; eliminated 7/1953 | | NAKINA |
| 6278 | CHAX | John W. Chartrand (Chartrand's Traffic Service) | Jan-52 | | NRHS |
| 6279 | CHAX | Chartrand's Tank Car Service | 10/57; eliminated 1/58 | | NRHS |
| 6280 | CHAX | Chartrand's Tank Car Rentals | added 1/58; eliminated 10/58 | | NRHS |
| 6281 | CHAX | Chartrand's Tank Car Service, Inc. | added 10/58; 4/61-7/2000 | | NRHS |
| 6282 | CHAX | *CHARLOTTE SOUTHERN RAILROAD | | | PWRC |
| 6283 | CHAX | +CHARTRAND'S TANK CAR SERVICE, INC. | | | PWRC |
| 6284 | CHAX | Chartrand's Tank Car Service | | | RSRV |
| 6285 | CHAX | CHARTRANDS TANK CAR SERVICE INC | | | SCAC3 |
| 6286 | CHAX | Chartrand's Tank Car Service, Inc. | | USA | TRAFFIC |
| 6287 | CHAZ | CHAMPION AUTOMOTIVE | | | PWRC |
| 6288 | CHB | Airline Chelyabinsk Air Enterprise Joint Stock Company | IATA: H6, Callsign: Cheravia, | RUS | AVCODES |
| 6289 | CHB | China West Air Ltd. | IATA: PN, Callsign: West China, IATA Prefix: 847, Designator PN instated by IATA | PRC | AVCODES |
| 6290 | CHBA | CHICO, B A MARINE SERVICE INC | | | SCAC3 |
| 6291 | CHBB | CHARNER BUS CORP | | | SCAC3 |
| 6292 | CHBB | CHAMPLAIN VALLEY PLUMBING & HEATING | | | SCAC4 |
| 6293 | CHBC | CHARLES BLUESTONE COMPANY | | | SCAC3 |
| 6294 | CHBE | CHAMBERS TRUCKING | | | SCAC3 |
| 6295 | CHBF | CHAM BANA TRUCKING | | | SCAC3 |
| 6296 | CHBG | CHEMICAL BARGE CO | | | SCAC3 |
| 6297 | CHBH | CHINOOK BUS TOURS | | | SCAC3 |
| 6298 | CHBH | CHAMBERS, ISAAC CORDILL | | | SCAC4 |
| 6299 | CHBI | CHAPP & BUSHEY OIL CO | | | SCAC4 |
| 6300 | CHBJ | CHOUINARD, LEON | | | SCAC4 |
