| 2101 | CCCB | CENTRAL COAST CABINETS | | | SCAC4 |
| 2102 | CCCC | COLORADO CARTAGE COMPANY, INC. | | | PWRC |
| 2103 | CCCC | CENTRAL CALIFORNIA CARTAGE COMPANY | | | SCAC4 |
| 2104 | CCCE | CONDOR CARRIER INC | | | SCAC3 |
| 2105 | CCCE | CLASSIC CAR CORNER LTD | | | SCAC4 |
| 2106 | CCCG | CAPE COD CARTAGE INC | | | SCAC3 |
| 2107 | CCCG | CCC TRUCKING | | | SCAC4 |
| 2108 | CCCI | CONTINENTAL CAN COMPANY, INC. | | | PWRC |
| 2109 | CCCI | CONTINENTAL CONTRACT CARRIER CORP | | | SCAC3 |
| 2110 | CCCJ | CONTINENTAL COURIER CORP | | | SCAC3 |
| 2111 | CCCJ | CONTINENTAL COURIER CORP | | | SCAC4 |
| 2112 | CCCL | Connecticut Central R.R. Co. | added 1/1988; 1/1994; eliminated 10/1998; 7/2000-7/2005 | | NAKINA |
| 2113 | CCCL | Connecticut Central R.R. Co. | added 1/88; 1/94; eliminated 10/98; 7/2000 | | NRHS |
| 2114 | CCCL | CONNECTICUT CENTRAL RAILROAD | | | PWRC |
| 2115 | CCCL | Connecticut Central Railroad | | | RSRV |
| 2116 | CCCL | CONNECTICUT CENTRAL RAILROAD | | | SCAC3 |
| 2117 | CCCL | CRYSTAL CAP CLEANERS INC | | | SCAC4 |
| 2118 | CCCM | CROUSE CONTRACT CARRIER INC | | | SCAC3 |
| 2119 | CCCM | COMMAND CONTROL CANINE LTD | | | SCAC4 |
| 2120 | CCCN | CLIENTALE CARTAGE CORP | | | SCAC3 |
| 2121 | CCCO | CAMIN CARGO CONTROL | | | SCAC4 |
| 2122 | CCCP | COMMERCIAL CARRIER CORPORATION | | | SCAC3 |
| 2123 | CCCP | COMMERCIAL CARRIER LOGISTICS LLC | | | SCAC4 |
| 2124 | CCCQ | CAMPBELL CARTAGE CO INC | | | SCAC3 |
| 2125 | CCCR | CROSS COUNTRY CARTAGE LTD | | | SCAC4 |
| 2126 | CCCS | CAROLINA CONTRACT CARRIERS INC | | | SCAC3 |
| 2127 | CCCStL | CLEVELAND CINCINNATI CHICAGO & ST. LOUIS RWY | | | PWRC |
| 2128 | CCCSTL | Cleveland, Cincinnati, Chicago and St. Louis Ry. (Cincinnati Northern R.R.) | Real: NOR | USA | TRAFFIC |
| 2129 | CCCT | Central California Traction Co. | 4/1938 | | NAKINA |
| 2130 | CCCT | Central California Traction Co. | Apr-38 | | NRHS |
| 2131 | CCCT | CENTRAL CALIFORNIA TRACTION CO. | | | PWRC |
| 2132 | CCCU | CONRAIL CONTAINER GMBH | | D | BIC |
| 2133 | CCCU | COMPASS CONTAINER CO INC | | | PWRC |
| 2134 | CCCU | Compass Container | | | RSRV |
| 2135 | CCCU | COMPASS CONTAINER INC. | | | SCAC3 |
| 2136 | CCCU | CONRAIL CONTAINER SURVEY & SALES GM | | | SCAC4 |
| 2137 | CCCV | CITY CAB COMPANY & LIMOUSINE SERVIC | | | SCAC3 |
| 2138 | CCCV | CAROLINA CUSTOM CARRIER INC | | | SCAC4 |
| 2139 | CCCW | CHAPMAN CARTAGE CO INC | | | SCAC3 |
| 2140 | CCCX | CII Carbon L.L.C. | added 1/2004; 7/2005; eliminated 7/2006 | | NAKINA |
| 2141 | CCCX | Carondelet Coke Corp. (captive service) | 1/1994 (not listed) | | NAKINA |
| 2142 | CCCX | Coastal Chemical Corp. | added 7/1960; 4/1961-4/1970; eliminated 10/1972 | | NAKINA |
| 2143 | CCCX | Continental Carbon Co. | 1/1943-10/1957; eliminated 7/1959 | | NAKINA |
| 2144 | CCCX | Crystal Chemical Corp. | 7/1923 | | NAKINA |
| 2145 | CCCX | Continental Carbon Co. | 1/52-10/57; eliminated 7/59 | | NRHS |
| 2146 | CCCX | Coastal Chemical Corp. | added 7/60; 4/61-4/70; eliminated 10/72 | | NRHS |
| 2147 | CCCX | Carondelet Coke Corp. (captive service) | Jan-94 | | NRHS |
| 2148 | CCCX | *CRYSTAL CHEMICAL CORP. | | | PWRC |
| 2149 | CCCX | *CONTINENTAL CARBON CO. | | | PWRC |
| 2150 | CCCX | *COASTAL CHEMICAL CORP. | | | PWRC |
| 2151 | CCCX | *CAPE COD CENTRAL | | | PWRC |
| 2152 | CCCX | *CARONDELET COKE CORP. (CAPTIVE SERVICE) | | | PWRC |
| 2153 | CCCX | +CII CARBON LLC | | | PWRC |
| 2154 | CCCX | Carondelet Coke Corporation | | | RSRV |
| 2155 | CCCX | COASTAL CHEMICAL CORP | | | SCAC3 |
| 2156 | CCCX | CII CARBON LLC | | | SCAC4 |
| 2157 | CCCY | CONTRACT CARTAGE COMPANY | | | SCAC3 |
| 2158 | CCCZ | *CATENARY COAL COMPANY | | | PWRC |
| 2159 | CCCZ | *COMPASS CONTAINER CO INC | | | PWRC |
| 2160 | CCCZ | Compass Container | | | RSRV |
| 2161 | CCCZ | COMPASS CONTAINER INC. | | | SCAC3 |
| 2162 | CCCZ | COMPASS CONTAINER CO INC | | | SCAC4 |
| 2163 | CCD | Carlos Cervantes Del Rio | Callsign: Carlos Cervantes, | MEX | AVCODES |
| 2164 | CCD | Cascade Airways | Callsign: Cascade, | USA | AVCODES |
| 2165 | CCD | Dalian Airlines Co., Ltd. | Founded in 2011. Commenced operations on 26 December 2011. | PRC | AVCODES |
| 2166 | CCD | The Colorado Springs & Cripple Creek District Ry. (Colorado Springs & Cripple Creek R.R.) | 7/1923 | | NAKINA |
| 2167 | CCD | The Colorado Springs & Cripple Creek District Ry. (Colorado Springs & Cripple Creek R.R.) | 23-Jul | | NRHS |
| 2168 | CCD | COLORADO SPRINGS & CRIPPLE CREEK DISTRICT RWY. | | | PWRC |
| 2169 | CCDA | COASTAL CONNECTION | | | SCAC3 |
| 2170 | CCDA | CROSS CANADA AUTO BODY SUPPLY | | | SCAC4 |
| 2171 | CCDB | CROSS COUNTRY DISTRIBUTORS INC | | | SCAC3 |
| 2172 | CCDB | CROSS CREEK DISTRIBUTORS INC | | | SCAC4 |
| 2173 | CCDC | C C C | | | SCAC3 |
| 2174 | CCDC | C C C | | | SCAC4 |
| 2175 | CCDD | C & S CPT DISTRIBUTION INC | | | SCAC3 |
| 2176 | CCDE | C CARL DELIVERY SERVICE | | | SCAC3 |
| 2177 | CCDE | COLLECTION CONRAD C | | | SCAC4 |
| 2178 | CCDG | COAST TO COAST DISTRIBUTING INC | | | SCAC3 |
| 2179 | CCDH | CONCORD CARTAGE AND DISTRIBUTION | | | SCAC3 |
| 2180 | CCDI | C & C DELIVERY INC | | | SCAC3 |
| 2181 | CCDI | CURTIS CANADA INC | | | SCAC4 |
| 2182 | CCDJ | COMMODITY CARRIERS INC | | | SCAC3 |
| 2183 | CCDK | NORTH AMERICAN SHIP AGENCIES, INC. | | | SCAC3 |
| 2184 | CCDL | COASTAL COURIER DELIVERY SERVICE IN | | | SCAC3 |
| 2185 | CCDM | COMPLETE CRATING & CARTAGE CORP | | | SCAC3 |
| 2186 | CCDM | COURIER COMPANY, THE | | | SCAC4 |
| 2187 | CCDN | CAPE COD OIL | | | SCAC4 |
| 2188 | CCDO | CONTRACT CARRIER DIVISION (DIV OF C | | | SCAC3 |
| 2189 | CCDP | CIRCLE CITY DISPATCH INC | | | SCAC3 |
| 2190 | CCDP | CROSS COUNTRY TRANSPORT INC | | | SCAC4 |
| 2191 | CCDQ | CRESCENT CITY DRYAGE INC | | | SCAC3 |
| 2192 | CCDQ | CUES CANADA INC | | | SCAC4 |
| 2193 | CCDR | CHARTER COORDINATORS | | | SCAC3 |
| 2194 | CCDS | C & C DISTRIBUTORS INC | | | SCAC3 |
| 2195 | CCDS | CCD CONSULTING | | | SCAC4 |
| 2196 | CCDT | CIRCLE D TRANSPORTATION | | | SCAC3 |
| 2197 | CCDT | CASCADE WEST LLC | | | SCAC4 |
| 2198 | CCDU | CONRO CONTAINER GMBH | | D | BIC |
| 2199 | CCDU | CONTAINER COMPANY AMSTERDAM | | | SCAC3 |
| 2200 | CCDU | CONTAINER COMPANY AMSTERDAM | | | SCAC4 |
