| 1 | CPP | Carpathian Air Transport Ltd. | Callsign: Carpatian, Ceased operations 2002. Designator KC recalled by IATA. Designator changed from KC* | H | AVCODES |
| 2 | CPP | Carpathian Air Transport Ltd. | IATA: KC, Callsign: Carpatian, Designator changed to KC | H | AVCODES |
| 3 | CPP | Carpathian Air Transport Ltd. | IATA: KC, Callsign: Carpatian, Designator KC recalled by IATA. Designator changed from KC* | H | AVCODES |
| 4 | CPP | Oulun Helikopteripalvelu Oy (Copterplus) | Callsign: Copterplus, | FIN | AVCODES |
| 5 | CPP | Copterplus Finland Oy | Callsign: Copterplus, | FIN | AVCODES |
| 6 | CPPA | COUDERSPORT & PORT ALLEGANY RR | | | PWRC |
| 7 | CPPB | CLAPP, BOB | | | SCAC3 |
| 8 | CPPC | CLIPPINGER CHEVROLET | | | SCAC3 |
| 9 | CPPC | CONSOLIDATED PRECISION PRODUCTS S D | | | SCAC4 |
| 10 | CPPD | CAPITAL PARCEL DELIVERY COMPANY | | | SCAC3 |
| 11 | CPPD | CONSOLIDATED PIANO PURCHASING LTD | | | SCAC4 |
| 12 | CPPE | CRIPPET TRANSPORT | | | SCAC3 |
| 13 | CPPF | CRIPPEN, ARCHIE C | | | SCAC3 |
| 14 | CPPF | CATERPILLAR PAVING PRODUCTS INC | | | SCAC4 |
| 15 | CPPG | CLIPPER SHIPPING AGENCY INC | | | SCAC3 |
| 16 | CPPG | COPPER COUNTRY CARTAGE LLC | | | SCAC4 |
| 17 | CPPI | COPPER TRANSPORT INC | | | SCAC3 |
| 18 | CPPJ | C A P TRANSPORTATION SERVICES | | | SCAC3 |
| 19 | CPPJ | CATALINA PRECISION PRODUCTS | | | SCAC4 |
| 20 | CPPK | CLIPPER TRUCKING | | | SCAC3 |
| 21 | CPPK | Central Suburban Passenger Company | | RUS | TRAFFIC |
| 22 | CPPL | CAPPARELLE TRUCKING | | | SCAC3 |
| 23 | CPPM | COPE, PAUL INC | | | SCAC3 |
| 24 | CPPM | CENTRAL PETROLEUM | | | SCAC4 |
| 25 | CPPN | COPPINI, LEONARD JOHN | | | SCAC3 |
| 26 | CPPN | COOPERATIVE PRODUCERS INC | | | SCAC4 |
| 27 | CPPO | CIPPONERI, J W TRUCKING | | | SCAC3 |
| 28 | CPPO | CANAL PETROLEUM PRODUCTS INC | | | SCAC4 |
| 29 | CPPP | COMMERCIAL PIPE PRODUCTS INC | | | SCAC3 |
| 30 | CPPP | CULPEPER TRANSPORT CO INC | | | SCAC4 |
| 31 | CPPQ | CLIPPER MOTOR SERVICE INC | | | SCAC3 |
| 32 | CPPR | COPPER STEAMSHIP COMPANY, THE | | | SCAC3 |
| 33 | CPPR | COPPER STEAMSHIP COMPANY, THE | | | SCAC4 |
| 34 | CPPS | CLIPPER SOUTH INC (AFFILIATE OF CLI | | | SCAC3 |
| 35 | CPPS | CUPPS PRODUCE L L C | | | SCAC4 |
| 36 | CPPT | CHOPPER EXPRESS INC | | | SCAC3 |
| 37 | CPPT | CHOPPER EXPRESS INC | | | SCAC4 |
| 38 | CPPU | CANADIAN PACIFIC RAILWAY COMPANY | | CDN | BIC |
| 39 | CPPU | CP RAIL [CANADIAN PACIFIC LTD.] | | | PWRC |
| 40 | CPPU | Canadian Pacific Railway | | | RSRV |
| 41 | CPPU | CANADIAN PACIFIC RAILWAY CO | | | SCAC4 |
| 42 | CPPV | CALTOP COOPERATIVE INC | | | SCAC3 |
| 43 | CPPX | Consolidated Papers, Inc. | added 1/1975; 1/1975-1/1980; eliminated 1/1994; 1/1994 (not listed); 7/2000-7/2005 (not listed) | | NAKINA |
| 44 | CPPX | Crystal Pearl Products Co. | 7/1937-4/1947 | | NAKINA |
| 45 | CPPX | Crichton Pine Products Co. | 8/1920-7/1923 | | NAKINA |
| 46 | CPPX | Crystal Pearl Products Co. | Apr-38 | | NRHS |
| 47 | CPPX | Consolidated Papers, Inc. | added 1/75; 1/75-1/80; eliminated 1/94; 7/2000 | | NRHS |
| 48 | CPPX | *CRITCHTON PINE PRODUCTS CO. | | | PWRC |
| 49 | CPPX | *CRYSTAL PEARL PRODUCTS CO. | | | PWRC |
| 50 | CPPX | +CONSOLIDATED PAPERS, INC. | | | PWRC |
| 51 | CPPX | Consolidated Papers | | | RSRV |
| 52 | CPPX | CONSOLIDATED PAPERS, INC. | | | SCAC4 |
| 53 | CPPY | CAPPYS TRANSPORT INC | | | SCAC3 |
| 54 | CPPZ | *COMMONWEALTH PROPANE CO. | | | PWRC |
| 55 | CPPZ | *CP RAIL [CANADIAN PACIFIC LTD.] | | | PWRC |
| 56 | CPPZ | Canadian Pacific Railway | | | RSRV |
| 57 | CPPZ | CANADIAN PACIFIC RAILWAY CO | | | SCAC4 |
