| 1 | CPC | CP Air | IATA: CP, Callsign: Empress, Bought by Pacific Western and merged to form Canadian Airlines International | CDN | AVCODES |
| 2 | CPC | Aero Campeche, C.A. de C.V. | Callsign: Aerocampeche, | MEX | AVCODES |
| 3 | CPC | Canadian Pacific Airlines Ltd. | IATA: CP, Callsign: Empress, Name changed to Canadian Airlines International Ltd. Name changed from CP Air | CDN | AVCODES |
| 4 | CPC | *COLLINS PINE COMPANY | | | PWRC |
| 5 | CPC | +CHICAGO PORT RAILROAD CO. | | | PWRC |
| 6 | CPC | CHICAGO PORT RAILROAD | | | SCAC4 |
| 7 | CPCA | CLELIAMAR PRODUCT CARRIER CORPORATI | | | SCAC4 |
| 8 | CPCB | CORPORATE COURIER INC | | | SCAC3 |
| 9 | CPCB | COOPER FUEL & AUTO REPAIR | | | SCAC4 |
| 10 | CPCD | CAPE COD EXPRESS, INC | | | SCAC3 |
| 11 | CPCD | CAPE COD EXPRESS INC | | | SCAC4 |
| 12 | CPCE | COAST PACIFIC CARRIER INC | | | SCAC4 |
| 13 | CPCF | CHAMPAGNE CARRIERS | | | SCAC3 |
| 14 | CPCF | CHAMPAGNE CARRIERS | | | SCAC4 |
| 15 | CPCG | CHESAPEAKE CARTAGE INC | | | SCAC3 |
| 16 | CPCG | CAPE CARGO INC | | | SCAC4 |
| 17 | CPCH | CHAMPION CARTAGE CO INC | | | SCAC3 |
| 18 | CPCH | CHAMPION CARTAGE CO INC | | | SCAC4 |
| 19 | CPCK | C-PAC TRUCKING INC | | | SCAC3 |
| 20 | CPCK | C P TRUCKING LLC | | | SCAC4 |
| 21 | CPCL | C P C LEASING CORPORATION | | | SCAC3 |
| 22 | CPCLP | CP Cargo Logistica e Transoportes Ferroviários de Mercadorias, SA | | PT | VKM |
| 23 | CPCM | CAPITOL CITY MOVING & STORAGE INC | | | SCAC3 |
| 24 | CPCN | CAPITOL COACHES COMPANY | | | SCAC3 |
| 25 | CPCO | COMPTON PLASTER CO INC | | | SCAC3 |
| 26 | CPCP | CPC PUMPS INTERNATIONAL | | | SCAC4 |
| 27 | CPCQ | C P CARTAGE | | | SCAC3 |
| 28 | CPCQ | CITRUS TRANSPORT LLC | | | SCAC4 |
| 29 | CPCR | CAPRICORN WAFERS | | | SCAC4 |
| 30 | CPCT | CAPRICORN TRANSPORTATION INC | | | SCAC4 |
| 31 | CPCU | SHENZHEN CAPCHEM TECHNOLOGY CO.,LTD. | | PRC | BIC |
| 32 | CPCU | CPC INDUSTRIPRODUKTER A/S | | | SCAC3 |
| 33 | CPCU | CHEVRON PHILLIPS CHEMICAL COMPANY | | | SCAC4 |
| 34 | CPCV | COMPUTER CARRIER CORPORATION | | | SCAC3 |
| 35 | CPCV | CPC TRUCKING | | | SCAC4 |
| 36 | CPCW | CAPITAL CHARTERWAYS INC | | | SCAC3 |
| 37 | CPCW | CATS PAW PRODUCTS | | | SCAC4 |
| 38 | CPCX | Chevron Phillips Chemical Co. L.P. | added 1/2001; 7/2005 | | NAKINA |
| 39 | CPCX | CPS Chemical Co., Inc. | 1/1994-7/2000 (not listed) | | NAKINA |
| 40 | CPCX | Whittaker Corp., Providence Coatings & Chemicals Division | added 10/1980; eliminated 1/1981 | | NAKINA |
| 41 | CPCX | CPL Corp., Chemical Products Division | added 4/1977; 1/1980; eliminated 10/1980 | | NAKINA |
| 42 | CPCX | Chemical Products Corp. | added 1/1969; 4/1970-1/1975; eliminated 4/1977 | | NAKINA |
| 43 | CPCX | Cosden Petroleum Corp. | 7/1937-4/1961; eliminated 10/1964 | | NAKINA |
| 44 | CPCX | Cosden Petroleum Corp. | 4/38-4/61 | | NRHS |
| 45 | CPCX | Chemical Products Corp. | added 1/69; 4/70-1/75 | | NRHS |
| 46 | CPCX | CPL Corp., Chemical Products Division | 1/80; eliminated 10/80 | | NRHS |
| 47 | CPCX | Whittaker Corp., Providence Coatings & Chemicals Division | added 10/80; eliminated 1/81 | | NRHS |
| 48 | CPCX | CPS Chemical Co., Inc. | 1/94-7/2000 | | NRHS |
| 49 | CPCX | Chevron Phillips Chemical Co. L.P. | added 1/2001 | | NRHS |
| 50 | CPCX | *COSDEN PETROLEUM CORP. | | | PWRC |
| 51 | CPCX | *WHITTAKER CORP, PROVIDENCE COATINGS & CHEMICALS DIV. [CPL CORP.; CHEMICAL PRODUCTS CORP.] | | | PWRC |
| 52 | CPCX | *CPS CHEMICAL COMPANY [RETIRED 04-26-94 ATP] | | | PWRC |
| 53 | CPCX | +CHEVRON PHILLIPS CHEMICAL CO. LP | | | PWRC |
| 54 | CPCX | Chevron Phillips Chemical | | | RSRV |
| 55 | CPCX | CHEVRON PHILLIPS CHEMICAL COMPANY L | | | SCAC4 |
| 56 | CPCY | CAPITAL CITY TRANSFER | | | SCAC3 |
| 57 | CPCZ | CORN PRODUCTS COMPANY | | | PWRC |
