| 1 | CAC | Conquest Airlines | Callsign: Conquest Air, | USA | AVCODES |
| 2 | CAC | California Air Charter | Callsign: Calair, | USA | AVCODES |
| 3 | CAC | Conquest Airlines | | | ICAO1 |
| 4 | CAC | Cleveland, Akron & Columbus Railway | | USA | TRAFFIC |
| 5 | CACB | CAMPBELL CARTAGE COMPANY | | | SCAC3 |
| 6 | CACB | CAPTAIN DANS | | | SCAC4 |
| 7 | CACC | C A C THREE THOUSAND (3000) INC | | | SCAC4 |
| 8 | CACC | Cacciamali | | I | TRAFFIC |
| 9 | CACE | C & C EXPRESS, INC | | | SCAC3 |
| 10 | CACE | CACINO MONTALVO, RAMON | | | SCAC4 |
| 11 | CACF | CASPERS CARTAGE INC | | | SCAC3 |
| 12 | CACF | CAPITOL EXPRESS INC | | | SCAC4 |
| 13 | CACG | CANADA CARTAGE SYSTEM LIMITED PARTN | | | SCAC4 |
| 14 | CACI | CACTUS FEEDERS INC, | | | PWRC |
| 15 | CACI | CHANICE & CHANICE TRANSPORTATION IN | | | SCAC3 |
| 16 | CACI | COLEMAN AMERICAN COMPANIES INC | | | SCAC4 |
| 17 | CACJ | CARGO CARRIERS CORP | | | SCAC3 |
| 18 | CACK | CRANE, A C SERVICE INC | | | SCAC3 |
| 19 | CACK | CARDINAL COACH INC | | | SCAC4 |
| 20 | CACM | CASCADE MOVING & STORAGE INC | | | SCAC3 |
| 21 | CACN | C & C TRUCKING INC | | | SCAC3 |
| 22 | CACO | CHERNEY, A CO | | | SCAC3 |
| 23 | CACQ | CAL CARGO EXPRESS | | | SCAC3 |
| 24 | CACR | CARDINAL CARRIER CORP | | | SCAC3 |
| 25 | CACR | C & C REALTY | | | SCAC4 |
| 26 | CACS | COUNTRY AFFAIR CUSTOM CANDLES INC | | | SCAC4 |
| 27 | CACT | CAPITAL CITY COMPANIES INC | | | SCAC3 |
| 28 | CACT | CARGO CONNECTION | | | SCAC4 |
| 29 | CACU | CP SHIPS | | | SCAC4 |
| 30 | CACV | The New York, Susquehanna and Western Ry. Corp. | eliminated 4/1996 | | NAKINA |
| 31 | CACV | Cooperstown and Charlotte Valley Ry. Corp. | 1/1975; added 4/1975; 1/1980; eliminated 10/1988; 1/1994 | | NAKINA |
| 32 | CACV | Cooperstown and Charlotte Valley Ry. Corp. | 1/75; added 4/75; 1/80; eliminated 10/88; 1/94 | | NRHS |
| 33 | CACV | The New York, Susquehanna and Western Ry. Corp. | eliminated 4/96 | | NRHS |
| 34 | CACV | NEW YORK, SUSQUEHANNA & WESTERN RWY. CORP. [COOPERSTOWN & CHARLOTTE VALLEY RWY] | | | PWRC |
| 35 | CACV | Cooperstown and Charlotte Valley Railway | | | RSRV |
| 36 | CACV | COOPERSTOWN & CHARLOTTE VALLEY | | | SCAC3 |
| 37 | CACV | CANADA WEST CARTAGE | | | SCAC4 |
| 38 | CACW | COOSEMANS ATLANTA INC | | | SCAC4 |
| 39 | CACX | Young Refining Corp. | added 7/1971; eliminated 10/1972 | | NAKINA |
| 40 | CACX | Cracker Asphalt Corp. | added 10/1962; 7/1965-4/1970; eliminated 7/1971 | | NAKINA |
| 41 | CACX | Pittsburgh Plate Glass Co., Columbia Chemical Div. | 1/1941-1/1943 | | NAKINA |
| 42 | CACX | The Columbia Alkali Corp. | 7/1937-4/1938 | | NAKINA |
| 43 | CACX | Monsanto Chemical Works | 8/1920 | | NAKINA |
| 44 | CACX | The Columbia Alkali Corp. | Apr-38 | | NRHS |
| 45 | CACX | Cracker Asphalt Corp. | 7/65-4/70 | | NRHS |
| 46 | CACX | Young Refining Corp. | eliminated 10/72 | | NRHS |
| 47 | CACX | *MONSANTO CHEMICAL WORKS | | | PWRC |
| 48 | CACX | *COLUMBIA CHEMICAL DIV., PITTSBURGH PLATE GLASS CO. | | | PWRC |
| 49 | CACX | *YOUNG REFINING CORP. [CRACKER ASPHALT CORP.] | | | PWRC |
| 50 | CACX | CRACKER ASPHALT CORP | | | SCAC3 |
| 51 | CACX | COOPERSTOWN & CHARLOTTE VALLEY RAIL | | | SCAC4 |
| 52 | CACY | CANADIAN INDUSTRIAL TUBE BEND & MFG | | | SCAC4 |
| 53 | CACZ | *CALAVARAS CEMENT | | | PWRC |
| 54 | CACZ | *COMACASA LINE | | | PWRC |
| 55 | CACZ | Comacasa Line | | | RSRV |
| 56 | CACZ | COMACASA LINE | | | SCAC4 |
