| 201 | CABT | C A T TRUCKING INC | | | SCAC3 |
| 202 | CABU | CHAKIAT AGENCIES PVT LTD | | IND | BIC |
| 203 | CABU | BACARDI & COMPANY LTD. | | | PWRC |
| 204 | CABU | Chakiat Agencies | | | RSRV |
| 205 | CABV | C A B TRANSPORTATION CORP | | | SCAC3 |
| 206 | CABW | C-AIR BROKERS & FORWARDERS INC | | | SCAC4 |
| 207 | CABX | Cabot Corp. | added 1/1961; 4/1961-7/2000; eliminated 1/2003; added 4/2005; 7/2005 | | NAKINA |
| 208 | CABX | Cabot Carbon Co. | 7/1935-10/1957; eliminated 1/1961 | | NAKINA |
| 209 | CABX | Cabot Carbon Co. | 4/38-10/57 | | NRHS |
| 210 | CABX | Cabot Corp. | 4/61-7/2000 | | NRHS |
| 211 | CABX | CABOT CORPORATION | | | PWRC |
| 212 | CABX | CABOT CORPORATION | | | PWRC |
| 213 | CABX | Cabot Corporation | | | RSRV |
| 214 | CABX | CABOT CORP | | | SCAC3 |
| 215 | CABY | CABY TRANSPORTATION CO | | | PWRC |
| 216 | CABY | C A B CONSTRUCTION LLC | | | SCAC4 |
| 217 | CABZ | CALUMET BUSINESS CENTER | | | PWRC |
| 218 | CAC | Conquest Airlines | Callsign: Conquest Air, | USA | AVCODES |
| 219 | CAC | California Air Charter | Callsign: Calair, | USA | AVCODES |
| 220 | CAC | Conquest Airlines | | | ICAO1 |
| 221 | CAC | Cleveland, Akron & Columbus Railway | | USA | TRAFFIC |
| 222 | CACB | CAMPBELL CARTAGE COMPANY | | | SCAC3 |
| 223 | CACB | CAPTAIN DANS | | | SCAC4 |
| 224 | CACC | C A C THREE THOUSAND (3000) INC | | | SCAC4 |
| 225 | CACC | Cacciamali | | I | TRAFFIC |
| 226 | CACE | C & C EXPRESS, INC | | | SCAC3 |
| 227 | CACE | CACINO MONTALVO, RAMON | | | SCAC4 |
| 228 | CACF | CASPERS CARTAGE INC | | | SCAC3 |
| 229 | CACF | CAPITOL EXPRESS INC | | | SCAC4 |
| 230 | CACG | CANADA CARTAGE SYSTEM LIMITED PARTN | | | SCAC4 |
| 231 | CACI | CACTUS FEEDERS INC, | | | PWRC |
| 232 | CACI | CHANICE & CHANICE TRANSPORTATION IN | | | SCAC3 |
| 233 | CACI | COLEMAN AMERICAN COMPANIES INC | | | SCAC4 |
| 234 | CACJ | CARGO CARRIERS CORP | | | SCAC3 |
| 235 | CACK | CRANE, A C SERVICE INC | | | SCAC3 |
| 236 | CACK | CARDINAL COACH INC | | | SCAC4 |
| 237 | CACM | CASCADE MOVING & STORAGE INC | | | SCAC3 |
| 238 | CACN | C & C TRUCKING INC | | | SCAC3 |
| 239 | CACO | CHERNEY, A CO | | | SCAC3 |
| 240 | CACQ | CAL CARGO EXPRESS | | | SCAC3 |
| 241 | CACR | CARDINAL CARRIER CORP | | | SCAC3 |
| 242 | CACR | C & C REALTY | | | SCAC4 |
| 243 | CACS | COUNTRY AFFAIR CUSTOM CANDLES INC | | | SCAC4 |
| 244 | CACT | CAPITAL CITY COMPANIES INC | | | SCAC3 |
| 245 | CACT | CARGO CONNECTION | | | SCAC4 |
| 246 | CACU | CP SHIPS | | | SCAC4 |
| 247 | CACV | The New York, Susquehanna and Western Ry. Corp. | eliminated 4/1996 | | NAKINA |
| 248 | CACV | Cooperstown and Charlotte Valley Ry. Corp. | 1/1975; added 4/1975; 1/1980; eliminated 10/1988; 1/1994 | | NAKINA |
| 249 | CACV | Cooperstown and Charlotte Valley Ry. Corp. | 1/75; added 4/75; 1/80; eliminated 10/88; 1/94 | | NRHS |
| 250 | CACV | The New York, Susquehanna and Western Ry. Corp. | eliminated 4/96 | | NRHS |
| 251 | CACV | NEW YORK, SUSQUEHANNA & WESTERN RWY. CORP. [COOPERSTOWN & CHARLOTTE VALLEY RWY] | | | PWRC |
| 252 | CACV | Cooperstown and Charlotte Valley Railway | | | RSRV |
| 253 | CACV | COOPERSTOWN & CHARLOTTE VALLEY | | | SCAC3 |
| 254 | CACV | CANADA WEST CARTAGE | | | SCAC4 |
| 255 | CACW | COOSEMANS ATLANTA INC | | | SCAC4 |
| 256 | CACX | Young Refining Corp. | added 7/1971; eliminated 10/1972 | | NAKINA |
| 257 | CACX | Cracker Asphalt Corp. | added 10/1962; 7/1965-4/1970; eliminated 7/1971 | | NAKINA |
| 258 | CACX | Pittsburgh Plate Glass Co., Columbia Chemical Div. | 1/1941-1/1943 | | NAKINA |
| 259 | CACX | The Columbia Alkali Corp. | 7/1937-4/1938 | | NAKINA |
| 260 | CACX | Monsanto Chemical Works | 8/1920 | | NAKINA |
| 261 | CACX | The Columbia Alkali Corp. | Apr-38 | | NRHS |
| 262 | CACX | Cracker Asphalt Corp. | 7/65-4/70 | | NRHS |
| 263 | CACX | Young Refining Corp. | eliminated 10/72 | | NRHS |
| 264 | CACX | *MONSANTO CHEMICAL WORKS | | | PWRC |
| 265 | CACX | *COLUMBIA CHEMICAL DIV., PITTSBURGH PLATE GLASS CO. | | | PWRC |
| 266 | CACX | *YOUNG REFINING CORP. [CRACKER ASPHALT CORP.] | | | PWRC |
| 267 | CACX | CRACKER ASPHALT CORP | | | SCAC3 |
| 268 | CACX | COOPERSTOWN & CHARLOTTE VALLEY RAIL | | | SCAC4 |
| 269 | CACY | CANADIAN INDUSTRIAL TUBE BEND & MFG | | | SCAC4 |
| 270 | CACZ | *CALAVARAS CEMENT | | | PWRC |
| 271 | CACZ | *COMACASA LINE | | | PWRC |
| 272 | CACZ | Comacasa Line | | | RSRV |
| 273 | CACZ | COMACASA LINE | | | SCAC4 |
| 274 | CAD | Chilliwack Aviation Ltd. | Callsign: Chilliwackair, | CDN | AVCODES |
| 275 | CAD | PT Cardig Air | IATA: 8F, Callsign: Cardig Air, IATA Prefix: 690, Designator 8F* recalled by IATA. | RI | AVCODES |
| 276 | CAD | PT Cardig Air | Callsign: Cardig Air, Designator 8F* recalled by IATA. | RI | AVCODES |
| 277 | CAD | Chilliwack Aviation | | | ICAO1 |
| 278 | CAD | Cadiz R.R. Co. | 1/1975; added 4/1977; 1/1980; eliminated 1/1989; eliminated 4/1989 | | NAKINA |
| 279 | CAD | Cadiz R.R. Co. | 1/75-1/80; eliminated 1/89; eliminated 4/89 | | NRHS |
| 280 | CAD | CADIZ RAILROAD | | | PWRC |
| 281 | CAD | Cadiz Railroad | | | RSRV |
| 282 | CAD | Cadiz Railroad | | USA | TRAFFIC |
| 283 | CADA | CAD MARKETING INC | | | SCAC3 |
| 284 | CADA | CAD TRANSPORTATION INC | | | SCAC4 |
| 285 | CADB | CANDLEBROOK DELIVERY SERVICE INC | | | SCAC3 |
| 286 | CADC | CARDINAL VAN & STORAGE INC | | | SCAC3 |
| 287 | CADD | CADDELL TRANSIT CORPORATION | | | SCAC3 |
| 288 | CADF | CALIFORNIA FREIGHT CONNECTION | | | SCAC3 |
| 289 | CADG | CAMPBELL, DONALD G | | | SCAC3 |
| 290 | CADH | CALEDONIA HAULERS LLC | | | SCAC4 |
| 291 | CADI | CARRIER DELIVERY SERVICE INC | | | SCAC3 |
| 292 | CADK | CARDELLA TRUCKING INC | | | SCAC3 |
| 293 | CADL | CANA-DATUM MOULDS LTD | | | SCAC4 |
| 294 | CADM | CADDO MOVING & STORAGE | | | SCAC3 |
| 295 | CADM | CARSON, D M AND SONS INC | | | SCAC4 |
| 296 | CADN | CADDENS MOVING & STORAGE | | | SCAC3 |
| 297 | CADO | C & D DRAYAGE | | | SCAC3 |
| 298 | CADO | CANAM CIRCUIT BREAKERS SERVICES INC | | | SCAC4 |
| 299 | CADP | CALIFORNIA DISPATCH INC. | | | SCAC3 |
| 300 | CADQ | CARLOAD DELIVERY SERVICE | | | SCAC3 |
