| 2901 | CCSJ | COMPUTER COURIER SYSTEMS | | | SCAC3 |
| 2902 | CCSJ | CUSTOM COURIER SOLUTIONS INC | | | SCAC4 |
| 2903 | CCSK | CORPORACION CLC SOLUTIONS S DE RL D | | | SCAC4 |
| 2904 | CCSL | COLLECTIVE CARGO SYSTEMS INC | | | SCAC3 |
| 2905 | CCSM | COMPLETE CONTAINER SERVICES (DIV OF | | | SCAC3 |
| 2906 | CCSM | COMPLETE CONTAINER SERVICES (DIV OF | | | SCAC4 |
| 2907 | CCSN | CUSTOM CARRIERS INC | | | SCAC3 |
| 2908 | CCSN | CARTER & CARTER ENTERPRISES INC | | | SCAC4 |
| 2909 | CCSO | CENTRAL CONCRETE SUPPLY CO | | | SCAC3 |
| 2910 | CCSO | CUSIC SPECIALIZED TRANSPORT | | | SCAC4 |
| 2911 | CCSQ | CCS TRANSPORTATION INC | | | SCAC4 |
| 2912 | CCSS | CHOICE COURIER SERVICE(A DIV OF CHO | | | SCAC3 |
| 2913 | CCSS | CHOICE LOGISTICS INC (A DIV OF CHOI | | | SCAC4 |
| 2914 | CCSU | SERVIAL CC | | DK | BIC |
| 2915 | CCSU | TRANS OCEAN LTD | | | PWRC |
| 2916 | CCSU | Trans Ocean (Servial CC) | | | RSRV |
| 2917 | CCSU | TRANS OCEAN LTD | | | SCAC3 |
| 2918 | CCSU | SERVIAL CC | | | SCAC4 |
| 2919 | CCSV | CLEVELAND CARTAGE SERVICE | | | SCAC3 |
| 2920 | CCSV | CENTRAL CART SERVICES LTD | | | SCAC4 |
| 2921 | CCSW | CONCORD COURIER SERVICE INC | | | SCAC3 |
| 2922 | CCSW | CARTER COURIER SERVICES | | | SCAC4 |
| 2923 | CCSX | Columbia Cellulose Co., Ltd. | added 4/1956; 10/1957; eliminated 7/1959 | | NAKINA |
| 2924 | CCSX | Central Cold Storage Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 2925 | CCSX | Columbia Cellulose Co., Ltd. | 10/57; eliminated 7/59 | | NRHS |
| 2926 | CCSX | COLUMBIA CELLULOSE CO. LTD. | | | PWRC |
| 2927 | CCSY | COURIER SYSTEMS INC | | | SCAC3 |
| 2928 | CCSY | C & C TECHNOLOGIES INC | | | SCAC4 |
| 2929 | CCT | Cetty Taxi Aereo Nacional, S.A. de C.V. | Callsign: Cetty, | MEX | AVCODES |
| 2930 | CCT | Catran AG | Callsign: Catran, | CH | AVCODES |
| 2931 | CCT | Connect Air Ltd. | Callsign: Connect, | CDN | AVCODES |
| 2932 | CCT | Central California Traction Co. | 1/1941-1/1994; eliminated 10/1998; 7/2000-7/2005 | | NAKINA |
| 2933 | CCT | Central California Traction Co. | 1/52-1/94; eliminated 10/98; 7/2000 | | NRHS |
| 2934 | CCT | CENTRAL CALIFORNIA TRACTION CO. | | | PWRC |
| 2935 | CCT | Central California Traction | | | RSRV |
| 2936 | CCT | CENTRAL CALIFORNIA TRACTION COMPANY | | | SCAC4 |
| 2937 | CCT | Central California Traction | | USA | TRAFFIC |
| 2938 | CCTA | CORPUS CHRISTI TERMINAL ASSOCIATION (OUT OF OPERATION) | | | PWRC |
| 2939 | CCTB | CASTELLINI COMPANY | | | SCAC3 |
| 2940 | CCTB | CASTELLINI COMPANY | | | SCAC4 |
| 2941 | CCTC | COAST TO COAST TRUCKING INC | | | SCAC4 |
| 2942 | CCTD | CANART CATTLE CO LTD | | | SCAC4 |
| 2943 | CCTE | CONTINENTAL CATTLE CARRIERS LTD | | | SCAC3 |
| 2944 | CCTE | CONTINENTAL CATTLE CARRIERS LTD | | | SCAC4 |
| 2945 | CCTG | CONSOLIDATED CARTAGE COMPANY INC | | | SCAC3 |
| 2946 | CCTH | C & C TRUCKING | | | SCAC3 |
| 2947 | CCTI | C & C TRANSPORT INC | | | SCAC3 |
| 2948 | CCTI | CONTAINER CONNECTION OF TEXAS INC | | | SCAC4 |
| 2949 | CCTJ | CIRCLE C TRUCK BROKERAGE | | | SCAC3 |
| 2950 | CCTK | CROSS COUNTRY TRUCKING INC | | | SCAC4 |
| 2951 | CCTM | CITY CAR TERMINAL INC | | | SCAC3 |
| 2952 | CCTM | COAST TO COAST TRANSPORT LTD | | | SCAC4 |
| 2953 | CCTN | CASEY CARTING CO INC | | | SCAC3 |
| 2954 | CCTN | COASTAL CARRIERS TRUCK LINES INC | | | SCAC4 |
| 2955 | CCTO | C & C TRANSPORT CO | | | SCAC3 |
| 2956 | CCTO | COAST TO COAST TRANSPORT LTD | | | SCAC4 |
| 2957 | CCTP | CHANICE & CHANICE TRANSPORTATION, I | | | SCAC3 |
| 2958 | CCTQ | CONCORD TRUCKING | | | SCAC3 |
| 2959 | CCTQ | CHARLES CATTLE CO LTD | | | SCAC4 |
| 2960 | CCTR | C & C TRANSPORT INC | | | SCAC3 |
| 2961 | CCTU | COORDINATED CARIBBEAN TRANSPORT, INC. | | | PWRC |
| 2962 | CCTU | Coordinated Caribbean Transport | | | RSRV |
| 2963 | CCTU | CRAIGS CONTAINER COMPANY | | | SCAC4 |
| 2964 | CCTV | CARSON CITY TRANSFER & STORAGE | | | SCAC3 |
| 2965 | CCTV | C & | | | SCAC4 |
| 2966 | CCTW | COORDINATED CARIBBEAN TRANSPORT, INC. | | | PWRC |
| 2967 | CCTW | COORDINATED CARIBBEAN TRANSPORT, | | | SCAC3 |
| 2968 | CCTX | Coleto Creek Power WLE, LP | 7/2005 (not listed) | | NAKINA |
| 2969 | CCTX | Central Power and Light Co. | 1/1980; added 4/1980; 1/1994-7/2000; eliminated 1/2005 | | NAKINA |
| 2970 | CCTX | Central Power and Light Co. | 1/80; added 4/80; 1/94-7/2000 | | NRHS |
| 2971 | CCTX | *CENTRAL POWER AND LIGHT CO. | | | PWRC |
| 2972 | CCTX | +COLETO CREEK POWER WLE, LP | | | PWRC |
| 2973 | CCTX | Central Power and Light | | | RSRV |
| 2974 | CCTX | COLETO CREEK POWER WLE LP | | | SCAC4 |
| 2975 | CCTY | C & C TRUCKING | | | SCAC3 |
| 2976 | CCTY | C & C TRUCKING | | | SCAC4 |
| 2977 | CCTZ | CROWLEY MARITIME CORP. | | | PWRC |
| 2978 | CCTZ | Crowley Maritime Corporation | | | RSRV |
| 2979 | CCTZ | CROWLEY MARITIME CORP. | | | SCAC4 |
| 2980 | CCU | Compania Aerea Canaria de Transporte Aereo, S.A. d/b/a Seven Air | Callsign: Transcanarias, Ceased operations on 01 November 2000. | E | AVCODES |
| 2981 | CCUA | CC CANADA (DIVISION OF UNIVERSAL AM | | | SCAC3 |
| 2982 | CCUB | CAIN CUSTOMS BROKERS INC | | | SCAC3 |
| 2983 | CCUC | CHIEF CONSTRUCTION CO LTD | | | SCAC3 |
| 2984 | CCUF | CACTUS FREIGHT LINES | | | SCAC3 |
| 2985 | CCUF | CIRCLE C TRUCKING | | | SCAC4 |
| 2986 | CCUG | CCORCORAN TRUCCKING CCO INC | | | SCAC3 |
| 2987 | CCUH | CANADA CUSTOM SHUTTERS | | | SCAC4 |
| 2988 | CCUI | CARE COURIERS INCORPORATED | | | SCAC3 |
| 2989 | CCUI | CHASE COURIERS INC | | | SCAC4 |
| 2990 | CCUK | CIRCLE C TRUCKING | | | SCAC3 |
| 2991 | CCUK | CIRCUIT TRUCKING LLC | | | SCAC4 |
| 2992 | CCUL | CARDINAL COURIERS LTD | | | SCAC3 |
| 2993 | CCUL | CARDINAL COURIERS LTD | | | SCAC4 |
| 2994 | CCUM | COIN COURIER SERVICE INC | | | SCAC3 |
| 2995 | CCUN | CORAL CONSTRUCTION CO | | | SCAC3 |
| 2996 | CCUN | COASTAL COURIER INC | | | SCAC4 |
| 2997 | CCUO | Chicago-Chemung R.R. Corp. | added 7/1991; 1/1994-7/2005 | | NAKINA |
| 2998 | CCUO | Chicago-Chemung R.R. Corp. | added 7/91; 1/94-7/2000 | | NRHS |
| 2999 | CCUO | CHICAGO-CHEMUNG RAILROAD CORP. | | | PWRC |
| 3000 | CCUO | Chicago-Chemung Railroad | | | RSRV |
