| 1 | CAL | China Airlines | IATA: CI, Callsign: Dynasty, IATA Prefix: 297, | RC | AVCODES |
| 2 | CAL | Capitol Airways | IATA: CP, Callsign: Capitol, Ceased operations | GB | AVCODES |
| 3 | CAL | China Airlines | IATA: CI | | ICAO1 |
| 4 | CAL | China Airlines | | RC | TRAFFIC |
| 5 | CALA | The Carolina Southern R.R. Co. | added 7/1997; 7/2000; eliminated 10/2002; 7/2005 | | NAKINA |
| 6 | CALA | The Carolina Southern R.R. Co. | added 7/97; 7/2000 | | NRHS |
| 7 | CALA | CAROLINA SOUTHERN RAILROAD | | | PWRC |
| 8 | CALA | Carolina Southern Railroad | | | RSRV |
| 9 | CALA | CAROLINA SOUTHERN RAILROAD COMPANY, | | | SCAC4 |
| 10 | CALB | CAMEO LIMOUSINE SERVICE INC | | | SCAC3 |
| 11 | CALB | CALA INVESTMENTS LLC | | | SCAC4 |
| 12 | CALC | CALIFORNIA CARTAGE CO | | | SCAC3 |
| 13 | CALC | CALIFORNIA CARTAGE CO LLC | | | SCAC4 |
| 14 | CALD | CALDWELL FREIGHT LINES, INC | | | SCAC3 |
| 15 | CALD | CALDWELL FREIGHT LINES, INC | | | SCAC4 |
| 16 | CALE | CART-ALL EXPRESS INC | | | SCAC4 |
| 17 | CALF | CALIFORNIA TANK LINES, INC | | | SCAC3 |
| 18 | CALF | CALIFORNIA TANK LINES INC | | | SCAC4 |
| 19 | CALG | CALLAHAN GEO F | | | SCAC3 |
| 20 | CALGARY | | City: Calgary | USA | TRAFFIC |
| 21 | CALH | CALHOUN TRUCKING COMPANY INC | | | SCAC3 |
| 22 | CALI | CALIFORNIA MOVING & STORAGE | | | SCAC3 |
| 23 | CALI | CASCADE AGRONOMICS LLC | | | SCAC4 |
| 24 | CALJ | CAL-ARK INC | | | SCAC3 |
| 25 | CALJ | CALARK INC | | | SCAC4 |
| 26 | CALMR | Calgary Municipial Railway | | CDN | TRAFFIC |
| 27 | CALO | CORTEZ, ALFREDO | | | SCAC4 |
| 28 | CALP | CAL-PACIFIC TRUCK LINES, INC | | | SCAC3 |
| 29 | CALP | CALIPER EXPRESS | | | SCAC4 |
| 30 | CALR | CALIFORNIA FRESNO TRANSPORTATION CO | | | SCAC4 |
| 31 | CALS | CAPORE, L TRUCKING INC | | | SCAC3 |
| 32 | CALS | CARGO ALLIANCE SERVICE | | | SCAC4 |
| 33 | CALT | CALIFORNIA MOTOR TRANSPORT CO | | | SCAC3 |
| 34 | CALT | The Chicago and Alton R.R. Co. | Real: CA | USA | TRAFFIC |
| 35 | CALU | CALBERSON INTERNATIONAL | | | SCAC3 |
| 36 | CALU | RABANCO COMPANIES | | | SCAC4 |
| 37 | CALV | CALVIN, ART & SONS | | | SCAC3 |
| 38 | CALW | CALIFORNIA WAREHOUSE CO | | | SCAC3 |
| 39 | CALW | CALAWAY CO INC | | | SCAC4 |
| 40 | CALX | California Railcar Corp. | added 7/1979; 1/1980-7/2000; eliminated 1/2003; added 1/2004; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 41 | CALX | Calhoun Trading Co., Inc. | added 10/1974; 1/1975; eliminated 7/1976 | | NAKINA |
| 42 | CALX | American Cyanamid Co. | added 4/1954; 7/1954; eliminated 1/1957 | | NAKINA |
| 43 | CALX | American Cyanamid Co., Calco Chemical Division | added 10/1953; eliminated 4/1954 | | NAKINA |
| 44 | CALX | Calco Chemical Division, American Cyanamid Co. | 1/1941-1/1952; eliminated 10/1953 | | NAKINA |
| 45 | CALX | The Calco Chemical Co., Inc. | 7/1923-4/1938 | | NAKINA |
| 46 | CALX | The Calco Chemical Co., Inc. | Apr-38 | | NRHS |
| 47 | CALX | Calco Chemical Division, American Cyanamid Co. | 1/52; eliminated 10/53 | | NRHS |
| 48 | CALX | American Cyanamid Co., Calco Chemical Division | added 10/53; eliminated 4/54 | | NRHS |
| 49 | CALX | American Cyanamid Co. | added 4/54 | | NRHS |
| 50 | CALX | Calhoun Trading Co., Inc. | added 10/74; 1/75; eliminated 7/76 | | NRHS |
| 51 | CALX | California Railcar Corp. | added 7/79; 1/80-7/2000 | | NRHS |
| 52 | CALX | *AMERICAN CYANAMID, CALCO CHEMICAL DIV. | | | PWRC |
| 53 | CALX | *CADDO, ANTONINE & LITTLE MISSOURI | | | PWRC |
| 54 | CALX | *CALHOUN TRADING CO. INC. | | | PWRC |
| 55 | CALX | +CALIFORNIA RAILCAR CORPORATION | | | PWRC |
| 56 | CALX | California Railcar Corporation | | | RSRV |
| 57 | CALX | CALIFORNIA RAILCAR CORPORATION | | | SCAC4 |
| 58 | CALX | California Railcar Corp. | | USA | TRAFFIC |
| 59 | CALY | CALEDONIA LINES INC | | | SCAC3 |
