| 1 | CRP | Aerotaxis Corporativo, S.A. de C.V. | Callsign: Corporativo, | MEX | AVCODES |
| 2 | CRP | Corporate Air Travel, Inc. | Callsign: Corporate, | USA | AVCODES |
| 3 | CRP | Aerotransportes Corporativos, S.A. de C.V. | Callsign: Aerotranscorp, | MEX | AVCODES |
| 4 | CRP | Aerotransportes Corporativos | | | ICAO1 |
| 5 | CRP | Central Railroad of Pennsylvania | 1/1975-1/1980 | | NAKINA |
| 6 | CRP | Central Railroad of New Jersey | 10/1957-7/1965 | | NAKINA |
| 7 | CRP | Central Railroad of Pennsylvania | 1/1946-7/1954 | | NAKINA |
| 8 | CRP | Central Railroad of Pennsylvania | Jan-52 | | NRHS |
| 9 | CRP | Central Railroad of New Jersey | 10/57-7/65 | | NRHS |
| 10 | CRP | Central Railroad of Pennsylvania | 1/75-1/80 | | NRHS |
| 11 | CRP | CONSOLIDATED RAIL CORP. [CENTRAL RAILROAD OF PENNSYLVANIA] | | | PWRC |
| 12 | CRP | Central Railroad of Pennsylvania (Norfolk Southern) | | | RSRV |
| 13 | CRP | Colas Rail Polska sp.z.o.o | | PL | TRAFFIC |
| 14 | CRPA | CENTRAL RAILROAD COMPANY OF PENNSYLVANIA | | | PWRC |
| 15 | CRPA | C R S | | | SCAC4 |
| 16 | CRPC | CRIPPLE CREEK CHARTER | | | SCAC3 |
| 17 | CRPC | CROSSROADS PETROLEUM TRANSPORT LLC | | | SCAC4 |
| 18 | CRPD | CHARTER PROPERTIES INC | | | SCAC4 |
| 19 | CRPF | CRAPO LTD | | | SCAC4 |
| 20 | CRPG | CARRIER REPS/USA INC | | | SCAC3 |
| 21 | CRPH | CEDAR RAPIDS MOBILE HOME SERVICE IN | | | SCAC3 |
| 22 | CRPI | CONTAINER REPAIR SERVICES INC | | | SCAC3 |
| 23 | CRPL | CORPORATION LYAND | | | SCAC4 |
| 24 | CRPM | CRIPPEN, MICKEY RAY | | | SCAC3 |
| 25 | CRPM | CARLETON RESCUE EQUIPMENT LTD | | | SCAC4 |
| 26 | CRPO | CRISPIN OIL | | | SCAC4 |
| 27 | CRPP | CRIPPEN, C B & SONS | | | SCAC3 |
| 28 | CRPP | CANADIAN RECYCLED PLASTIC PRODUCTS | | | SCAC4 |
| 29 | CRPQ | CARPENTERS EXPRESS | | | SCAC3 |
| 30 | CRPQ | CONNERS EXPRESS | | | SCAC4 |
| 31 | CRPR | CARPENTER, B & SON TRUCKING | | | SCAC3 |
| 32 | CRPR | CRUZ PINO, RAUL FERNANDO | | | SCAC4 |
| 33 | CRPS | C R S T INC | | | SCAC3 |
| 34 | CRPS | CRST VAN EXPEDITED INC | | | SCAC4 |
| 35 | CRPT | CARPET TRANSPORT INC | | | SCAC3 |
| 36 | CRPU | CIMAR RENTING SA | | P | BIC |
| 37 | CRPU | NORFOLK SOUTHERN [CONSOLIDATED RAIL CORP.] | | | PWRC |
| 38 | CRPU | Conrail (CIMAR) | | | RSRV |
| 39 | CRPU | CONSOLIDATED RAIL CORP | | | SCAC3 |
| 40 | CRPU | CIMAR RENTING SA | | | SCAC4 |
| 41 | CRPV | CORPORATE SERVICES INCORPORATED | | | SCAC3 |
| 42 | CRPV | CARR, JAMES ROBERT JR | | | SCAC4 |
| 43 | CRPW | CRISP, WARREN W | | | SCAC3 |
| 44 | CRPX | Centennial Gas Liquids, L.L.C. | added 1/1998; 7/2000-7/2005; eliminated 7/2008 | | NAKINA |
| 45 | CRPX | Cairo Pickle Co. | added 4/1960; 4/1961; eliminated 1/1962 | | NAKINA |
| 46 | CRPX | Cairo Pickle Co. | 4/61; eliminated 1/62 | | NRHS |
| 47 | CRPX | Centennial Gas Liquids, L.L.C. | added 1/98; 7/2000 | | NRHS |
| 48 | CRPX | *CAIRO PICKLE CO. | | | PWRC |
| 49 | CRPX | +CENTENNIAL GAS LIQUIDS, LLC | | | PWRC |
| 50 | CRPX | Centennial Gas Liquids (Southwest Rail Industries) | | | RSRV |
| 51 | CRPX | SOUTHWEST RAIL INDUSTRIES INC | | | SCAC4 |
| 52 | CRPY | CHANDLER, RANDY SERVICES INC | | | SCAC4 |
| 53 | CRPZ | CENTRAL RAILROAD COMPANY OF PENNSYLVANIA | | | PWRC |
