| 6901 | CHQU | CHEMBRO QUIMICA LTDA | | BR | BIC |
| 6902 | CHQU | CHIQUITA BRANDS INTERNATIONAL | | | SCAC3 |
| 6903 | CHQU | CHEMBRO QUIMICA LTDA | | | SCAC4 |
| 6904 | CHQV | CHAMPIONS SERVICE INCORPORATED | | | SCAC3 |
| 6905 | CHQV | CORNISH HERITAGE VENTURES LLC | | | SCAC4 |
| 6906 | CHQY | CHRYSSI MARITIME COMPANY | | | SCAC3 |
| 6907 | CHR | Air Charter Services (ACS) | Callsign: Zaire Charter, | ZRE | AVCODES |
| 6908 | CHR | Christler Flying Service, Inc. | Callsign: Christler, | USA | AVCODES |
| 6909 | CHR | SC Aviation, Inc. | Callsign: Cheese Maker, ICAO designator changed to COL. ICAO callsign changed to Colony. | USA | AVCODES |
| 6910 | CHR | Chairman Airmotive II, LLC | Callsign: Chairman, | USA | AVCODES |
| 6911 | CHR | Air Charter Services | | | ICAO1 |
| 6912 | CHR | Chestnut Ridge Ry. Co. | 1/1975-1/1980; eliminated 4/1981; 1/1994-7/2005 | | NAKINA |
| 6913 | CHR | Chestnut Ridge Ry. Co. | 1/75-1/80; eliminated 4/81; 1/94-7/2000 | | NRHS |
| 6914 | CHR | CHESTNUT RIDGE RAILWAY CO. | | | PWRC |
| 6915 | CHR | Chestnut Ridge Railway | | | RSRV |
| 6916 | CHR | CHESTNUT RIDGE RAILWAY COMPANY | | | SCAC4 |
| 6917 | CHR | Cement Hranice, akciová společnost | | CZ | VKM |
| 6918 | CHRA | CHARLES TRANSFER INC | | | SCAC3 |
| 6919 | CHRB | CHARLES TRANSFER | | | SCAC3 |
| 6920 | CHRB | CHORBE FARM | | | SCAC4 |
| 6921 | CHRC | Chaparral R.R. Co., Inc. | added 7/1990; 1/1994; eliminated 7/1994; 7/2000-7/2005 | | NAKINA |
| 6922 | CHRC | Chaparral R.R. Co., Inc. | added 7/90; 1/94; eliminated 7/94; 7/2000 | | NRHS |
| 6923 | CHRC | CHAPARRAL RAILROAD COMPANY, INC. | | | PWRC |
| 6924 | CHRC | Chaparral Railroad | | | RSRV |
| 6925 | CHRC | CHAPARRAL RAILROAD COMPANY INC | | | SCAC3 |
| 6926 | CHRC | CHAPARRAL RAILROAD COMPANY INC | | | SCAC4 |
| 6927 | CHRD | CHARLOTTE VAN AND STORAGE CO, INC | | | SCAC3 |
| 6928 | CHRE | CHEROKEE INDUSTRIES | | | SCAC3 |
| 6929 | CHRF | CHURCHILL FREIGHT SERVICES INC | | | SCAC4 |
| 6930 | CHRG | CHARLTON TRANSPORT(QUEBEC) LTD | | | SCAC3 |
| 6931 | CHRG | CHAMPLIN, ROGER D | | | SCAC4 |
| 6932 | CHRH | CHURCH TRUCKING COMPANY INC | | | SCAC3 |
| 6933 | CHRI | CHEMTRANS INC | | | SCAC3 |
| 6934 | CHRI | CHRISTAL TRANSPORT | | | SCAC4 |
| 6935 | CHRJ | CHARBONNEAU, R & SONS INC | | | SCAC3 |
| 6936 | CHRK | CHRISTENSEN, R J TRUCKING | | | SCAC3 |
| 6937 | CHRL | CHURNS TRUCK LINES INC | | | SCAC3 |
| 6938 | CHRL | CHAVEZ OROZCO, MIRNA ALICIA | | | SCAC4 |
| 6939 | CHRN | CHEMICAL RAINBOW TANK LINES | | | SCAC3 |
| 6940 | CHRN | CHA-RP RENTAL CENTER INC | | | SCAC4 |
| 6941 | CHRO | CHIEFTAIN TRUCKING | | | SCAC3 |
| 6942 | CHRO | CHROMALLOY SOUTHWEST | | | SCAC4 |
| 6943 | CHRP | CHRISTOPHERSON TRUCKING | | | SCAC3 |
| 6944 | CHRQ | CHARTER INTERNATIONAL OIL CO | | | SCAC3 |
| 6945 | CHRR | Chesapeake R.R. Co. | 7/2000-7/2005 | | NAKINA |
| 6946 | CHRR | Chesapeake R.R. Co. | Jul-00 | | NRHS |
| 6947 | CHRR | CHESAPEAKE RAILROAD CO. | | | PWRC |
| 6948 | CHRR | Chesapeake Railroad | | | RSRV |
| 6949 | CHRR | CHESAPEAKE RAILROAD COMPANY | | | SCAC4 |
| 6950 | CHRS | CHRISTY TRUCKING COMPANY | | | SCAC3 |
| 6951 | CHRS | CHRISTY TRUCKING COMPANY | | | SCAC4 |
| 6952 | CHRT | CHRISTONI, J. R | | | SCAC3 |
| 6953 | CHRT | CHRISTONI J R | | | SCAC4 |
| 6954 | CHRU | CHEMOURS COMPANY FC LLC | | USA | BIC |
| 6955 | CHRU | Chemours Fc | | | RSRV |
| 6956 | CHRU | CHARGEURS REUNIS | | | SCAC3 |
| 6957 | CHRU | CHARGEURS REUNIS | | | SCAC4 |
| 6958 | CHRV | CHAMBERS TRANSPORTATION SERVICES IN | | | SCAC4 |
| 6959 | CHRW | CHARAPATA TRUCKING INC | | | SCAC3 |
| 6960 | CHRX | The Chesapeake Division | 1/1994-7/2005 (not listed) | | NAKINA |
| 6961 | CHRX | Canadian Hidrogas Resources Ltd. | added 7/1969; 4/1970-1/1980; eliminated 1/1983 | | NAKINA |
| 6962 | CHRX | Canadian Hidrogas Resources Ltd. | added 7/69; 4/70-1/80; eliminated 1/83 | | NRHS |
| 6963 | CHRX | The Chesapeake Division | 1/94-7/2000 | | NRHS |
| 6964 | CHRX | *CANADIAN HIDROGAS RESOURCES, LTD. | | | PWRC |
| 6965 | CHRX | *CHESAPEAKE RAILROAD CO. | | | PWRC |
| 6966 | CHRX | *CHEVRON OIL & REFINING CO. | | | PWRC |
| 6967 | CHRX | +THE CHESAPEAKE DIV., RAILROAD ENTHUSIASTS, INC. | | | PWRC |
| 6968 | CHRX | The Chesapeake Division | | | RSRV |
| 6969 | CHRX | THE CHESAPEAKE DIV., RAILROAD ENTHU | | | SCAC4 |
| 6970 | CHRY | CHEMICAL RESOURCE CORP | | | SCAC3 |
| 6971 | CHS | Challenge Aviation Pty. Ltd. | Callsign: Challenge Aviation, | AUS | AVCODES |
| 6972 | CHS | Chinggis Airways LLC | IATA: CW, Established in August 2011. Operations not started. | MGL | AVCODES |
| 6973 | CHS | Challenge Aviation | | | ICAO1 |
| 6974 | CHS | Charlotte Southern R.R. Co. | added 1/2004; eliminated 4/2004; 7/2005 | | NAKINA |
| 6975 | CHS | CHARLOTTE SOUTHERN RAILROAD | | | PWRC |
| 6976 | CHS | Charlotte Southern Railroad | | | RSRV |
| 6977 | CHS | CHARLOTTE SOUTHERN RAILROAD COMPANY | | | SCAC4 |
| 6978 | CHSA | CHARISMA SHIPPING LTD. OF MALTA | | | SCAC3 |
| 6979 | CHSA | CHARISMA SHIPPING LTD. OF MALTA | | | SCAC4 |
| 6980 | CHSB | CHASE, ALLEN C | | | SCAC3 |
| 6981 | CHSC | CHASE CARRIERS | | | SCAC3 |
| 6982 | CHSC | CHASE CARRIERS | | | SCAC4 |
| 6983 | CHSD | CHESAPEAKE INDUSTRIES | | | SCAC3 |
| 6984 | CHSE | CHEESE HAULING INC | | | SCAC3 |
| 6985 | CHSF | CHRISTIE TRANSFER & STORAGE INC | | | SCAC3 |
| 6986 | CHSG | CHRIS & SONS DELIVERY SERVICE | | | SCAC3 |
| 6987 | CHSG | CHASE LTD | | | SCAC4 |
| 6988 | CHSI | CHULA VISTA SANITARY SERVICES INC | | | SCAC3 |
| 6989 | CHSI | CHULA VISTA SANITARY SERVICES INC | | | SCAC4 |
| 6990 | CHSJ | CHASE TRANSFER CORPORATION | | | SCAC3 |
| 6991 | CHSK | CHESAPEAKE LIMOUSINE SERVICE INC | | | SCAC3 |
| 6992 | CHSK | CHESAPEAK | | | SCAC4 |
| 6993 | CHSL | CHRISTAL LINES | | | SCAC4 |
| 6994 | CHSM | CHASE MOVING & STORAGE | | | SCAC3 |
| 6995 | CHSN | CHAN-SHELL INC | | | SCAC3 |
| 6996 | CHSN | CHEMICAL ASSOCIATES TRANSPORTATION | | | SCAC4 |
| 6997 | CHSO | CHIPMAN MOVING & STORAGE CO | | | SCAC3 |
| 6998 | CHSP | CHRISTIAN TRANSPORT INC | | | SCAC4 |
| 6999 | CHSQ | CHESSOR WAREHOUSE & DRAYAGE INC | | | SCAC3 |
| 7000 | CHSQ | CHINA STEEL INC | | | SCAC4 |
