| 4001 | CEBG | CARGO SERVICES EXPRESS | | | SCAC4 |
| 4002 | CEBI | CARLETON BUS LINES INC | | | SCAC3 |
| 4003 | CEBI | COURIER EXPRESS/BIRMINGHAM INC | | | SCAC4 |
| 4004 | CEBJ | CHECKERED EXPRESS INC. | | | SCAC4 |
| 4005 | CEBK | CLEAN BULK TRANSPORTATION INC | | | SCAC3 |
| 4006 | CEBK | CLEOPATRA | | | SCAC4 |
| 4007 | CEBL | C & E TRANSPORTATION OF BILOXI INC | | | SCAC3 |
| 4008 | CEBL | CEB COURRIER INTERNATIONAL INC | | | SCAC4 |
| 4009 | CEBM | CONTAINER EXPRESS 2007 | | | SCAC4 |
| 4010 | CEBN | CTL EXPRESS LLC | | | SCAC4 |
| 4011 | CEBO | CEBCO TRUCKING INC | | | SCAC3 |
| 4012 | CEBO | C & E BOAT RENTAL LLC | | | SCAC4 |
| 4013 | CEBP | CERPA TRANSPORTATION | | | SCAC4 |
| 4014 | CEBQ | CENTRABALANCE | | | SCAC4 |
| 4015 | CEBR | CERUTTI BROS. TRUCKING, INC | | | SCAC3 |
| 4016 | CEBS | CHABOT ET BISSON INC | | | SCAC4 |
| 4017 | CEBT | CEBULSKI TRUCKING CO | | | SCAC3 |
| 4018 | CEBT | CUEBITZ LLC | | | SCAC4 |
| 4019 | CEBU | JUPITER WAGONS LTD. | | IND | BIC |
| 4020 | CEBU | CEC LINES LTD | | | SCAC4 |
| 4021 | CEBV | CARRARA TILE AND MARBLE LTD | | | SCAC4 |
| 4022 | CEBW | CENTRAL BAY WAREHOUSE CO INC | | | SCAC3 |
| 4023 | CEBX | Alstom Power Energy Recovery | added 10/2003; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 4024 | CEBX | Combustion Engineering, Inc. | added 1/1974; 1/1975-7/2000; eliminated 4/2003 | | NAKINA |
| 4025 | CEBX | Charles E. Brown, Estate | 7/1935-4/1938 | | NAKINA |
| 4026 | CEBX | Charles E. Brown | 7/1930-7/1932 | | NAKINA |
| 4027 | CEBX | Charles E. Brown, Estate | Apr-38 | | NRHS |
| 4028 | CEBX | Combustion Engineering, Inc. | added 1/74; 1/75-7/2000 | | NRHS |
| 4029 | CEBX | *CHARLES E. BROWN | | | PWRC |
| 4030 | CEBX | +ALSTOM POWER ENERGY RECOVERY [COMBUSTION ENGINEERING INC] | | | PWRC |
| 4031 | CEBX | Combustion Engineering | | | RSRV |
| 4032 | CEBX | ALSTOM POWER ENERGY RECOVERY | | | SCAC4 |
| 4033 | CEC | Celtic Airways Limited | Callsign: Celtair, Ceased operations. | GB | AVCODES |
| 4034 | CEC | China Eastern Business Jet Co., Ltd. | Callsign: Eastern Jet, | PRC | AVCODES |
| 4035 | CEC | Celtic Airways | | | ICAO1 |
| 4036 | CEC | CENTRAL CAB COMPANY | | | SCAC4 |
| 4037 | CECA | CENTRAL WAREHOUSE COMPANY | | | SCAC3 |
| 4038 | CECA | CELTIC CARTAGE INC | | | SCAC4 |
| 4039 | CECB | CHERRY CAPITAL CAB | | | SCAC3 |
| 4040 | CECC | CENTURY CONCRETE CO | | | SCAC3 |
| 4041 | CECC | GENTRY COACH CO INC | | | SCAC4 |
| 4042 | CECD | CENTRAL ILLINOIS COURRIER | | | SCAC4 |
| 4043 | CECE | COMET CHEMICAL TRANSPORT INC | | | SCAC3 |
| 4044 | CECF | CENTRAL CALIFORNIA CONFERENCE OF SE | | | SCAC3 |
| 4045 | CECG | CEMENT CARTAGE COMPANY LTD | | | SCAC3 |
| 4046 | CECG | CONQUEST NATIONWIDE CARRIERS | | | SCAC4 |
| 4047 | CECH | C-E CAST EQUIPMENT | | | SCAC3 |
| 4048 | CECH | COMERCIALIZADORA Y SERVICIOS INTERN | | | SCAC4 |
| 4049 | CECI | COLONIAL EXPRESS CO | | | SCAC3 |
| 4050 | CECI | COURIER EXPRESS/CHARLOTTE INC | | | SCAC4 |
| 4051 | CECJ | CENTER CITY COURIERS | | | SCAC3 |
| 4052 | CECJ | CENTER CITY COURIERS | | | SCAC4 |
| 4053 | CECK | CLARKE TRUCKING COMPANY | | | SCAC3 |
| 4054 | CECK | CEDAR CREEK TRANSFER SERVICE LTD | | | SCAC4 |
| 4055 | CECL | CIRCLE C ENTERPRISES INC | | | SCAC4 |
| 4056 | CECM | CENTRAL COAST MOVING & STORAGE | | | SCAC3 |
| 4057 | CECM | CAST CRETE | | | SCAC4 |
| 4058 | CECN | CONNECTIONS INC | | | SCAC3 |
| 4059 | CECN | CELADON CANADA INC | | | SCAC4 |
| 4060 | CECO | CECIL COUNTY | | | PWRC |
| 4061 | CECO | CONSOLIDATED EDISON COMPANY OF NEW | | | SCAC3 |
| 4062 | CECO | CHAZ EQUIPMENT COMPANY INC | | | SCAC4 |
| 4063 | CECP | CERCIELLO, C TRUCKING CO | | | SCAC3 |
| 4064 | CECP | CERCIELLO, C TRUCKING CO | | | SCAC4 |
| 4065 | CECQ | CENTRAL CARTAGE CO | | | SCAC3 |
| 4066 | CECR | CENTRAL CARRIERS INC | | | SCAC3 |
| 4067 | CECR | CENTRAL CARRIERS INC | | | SCAC4 |
| 4068 | CECR | Centennial Coal Rail | | AUS | TRAFFIC |
| 4069 | CECS | CENTRAL COURIER SERVICE | | | SCAC3 |
| 4070 | CECS | CPL EXPRESS INC | | | SCAC4 |
| 4071 | CECT | COMAGE CONTAINER LINES INC | | | SCAC4 |
| 4072 | CECU | HOYER SPECIAL LOGISTICS FRANCE | | F | BIC |
| 4073 | CECU | COMPAGNIE EXPLOITATION CONTENEURS | | | SCAC3 |
| 4074 | CECU | CECON ASA | | | SCAC4 |
| 4075 | CECV | COOPERATIVE ENERGY COMPANY | | | SCAC4 |
| 4076 | CECW | CONTAINER EXPERT CO LTD | | | SCAC3 |
| 4077 | CECY | CASE, HAROLD CO INC | | | SCAC3 |
| 4078 | CECZ | CAPITAL ELEVATOR COMPANY | | | PWRC |
| 4079 | CED | Compania Ecuatoriana de Transportes Aereos (CEDTA) | Callsign: Cedta, | EC | AVCODES |
| 4080 | CED | CEDTA (Compania Ecuatoriana De Transportes Aereos) | | | ICAO1 |
| 4081 | CEDA | CEDA-REACTOR LTD | | | SCAC4 |
| 4082 | CEDAR | Cedar Rapids Transit | | USA | TRAFFIC |
| 4083 | CEDB | COMPANIA EMBOTELLADORA DEL FUERTE S | | | SCAC4 |
| 4084 | CEDC | CEDAR VAN LINES, INC | | | SCAC3 |
| 4085 | CEDD | CONTINENTAL EXPRESS INC (DEDICATED | | | SCAC4 |
| 4086 | CEDF | CARDINAL EXPRESS DELIVERY SERVICES | | | SCAC4 |
| 4087 | CEDG | COLE, N D TRUCKING INC | | | SCAC4 |
| 4088 | CEDH | CUTTING EDGE LOGISTICS INC | | | SCAC4 |
| 4089 | CEDJ | COLYER, EDWARD J | | | SCAC3 |
| 4090 | CEDN | CERTAS DENIZCILIK VE TICARET A S | | | SCAC3 |
| 4091 | CEDN | CERVANTES DISTRIBUTOR INC | | | SCAC4 |
| 4092 | CEDO | CENTRAL CAROLINA WAREHOUSE INC | | | SCAC3 |
| 4093 | CEDP | CENDICO INC | | | SCAC3 |
| 4094 | CEDQ | CENTRAL DISTRIBUTING CO | | | SCAC3 |
| 4095 | CEDQ | CEDA INC | | | SCAC4 |
| 4096 | CEDR | Cedar River R.R. Co. | added 4/1992; 1/1994-7/2005 | | NAKINA |
| 4097 | CEDR | Cedar River R.R. Co. | added 4/92; 1/94-7/2000 | | NRHS |
| 4098 | CEDR | CEDAR RIVER RAILROAD COMPANY | | | PWRC |
| 4099 | CEDR | Cedar River Railroad | | | RSRV |
| 4100 | CEDR | CEDAR RIVER RAILROAD COMPANY | | | SCAC3 |
