| 1 | CCR | Carga Aerea Venezolana Caraven, S.A. | Callsign: Carga Caraven, | YV | AVCODES |
| 2 | CCR | Connectair (Airlines, Inc.) | Callsign: Connectair, | USA | AVCODES |
| 3 | CCR | Conciair Ltd | Callsign: Conciair, | GB | AVCODES |
| 4 | CCR | Kansas City Southern Ry. Co. | added 7/1994; 7/2000-7/2005 | | NAKINA |
| 5 | CCR | TennRail Corp. | added 4/1992; 1/1994; eliminated 7/1994 | | NAKINA |
| 6 | CCR | Corinth & Counce R.R. Co. | 10/1966 & 1/1975-1/1980; eliminated 4/1992 | | NAKINA |
| 7 | CCR | Corinth & Counce R.R. Co. | 10/66 & 1/75-1/80; eliminated 4/92 | | NRHS |
| 8 | CCR | TennRail Corp. | added 4/92; 1/94; eliminated 7/94 | | NRHS |
| 9 | CCR | Kansas City Southern Ry. Co. | added 7/94; 7/2000 | | NRHS |
| 10 | CCR | KANSAS CITY SOUTHERN RAILWAY CO. [CORINTH & COUNCE RR; TENNRAIL CORP.] | | | PWRC |
| 11 | CCR | Corinth and Counce Railroad (Kansas City Southern Railway) | | | RSRV |
| 12 | CCR | Corinth & Counce R.R. Co. | | USA | TRAFFIC |
| 13 | CCRA | Camp Chase Industrial R.R. Corp. | 7/2000-7/2005 | | NAKINA |
| 14 | CCRA | Camp Chase Industrial R.R. Corp. | Jul-00 | | NRHS |
| 15 | CCRA | CAMP CHASE INDUSTRIAL RAILROAD | | | PWRC |
| 16 | CCRA | Camp Chase Industrial Railroad | | | RSRV |
| 17 | CCRA | CAMP CHASE INDUSTRIAL RAILROAD CORP | | | SCAC4 |
| 18 | CCRB | COASTLINE CARRIERS INC | | | SCAC3 |
| 19 | CCRC | CONCRETE CARRIERS CORP | | | SCAC3 |
| 20 | CCRD | CONCORDIA LINE | | | PWRC |
| 21 | CCRD | CONCORD TRANSPORT SYSTEMS INC | | | SCAC3 |
| 22 | CCRD | C & C TRUCKING | | | SCAC4 |
| 23 | CCRE | CAR CARE INC | | | SCAC3 |
| 24 | CCRF | CCR INC | | | SCAC3 |
| 25 | CCRH | CARTEL CARRIERS | | | SCAC3 |
| 26 | CCRI | CARRIER CARTAGE INC | | | SCAC3 |
| 27 | CCRJ | CLASSIC CRUISERS INC | | | SCAC3 |
| 28 | CCRK | CLASSIC CARRIERS INC | | | SCAC3 |
| 29 | CCRK | CLASSIC CARRIERS INC | | | SCAC4 |
| 30 | CCRL | Cleveland Commercial R.R. Co. LLC | 7/2005 | | NAKINA |
| 31 | CCRL | CLEVELAND COMMERCIAL RAILROAD CO. LLC | | | PWRC |
| 32 | CCRL | CITY CAR RELEASING CO INC | | | SCAC3 |
| 33 | CCRL | CLEVELAND COMMERCIAL RAILROAD COMPA | | | SCAC4 |
| 34 | CCRM | CARRASCO, CARMELO C | | | SCAC3 |
| 35 | CCRM | CHEESEM | | | SCAC4 |
| 36 | CCRN | CORCORANS TRANSPORTATION INC | | | SCAC3 |
| 37 | CCRO | CHESPEAKE CONTAINER REPAIR CORP | | | SCAC3 |
| 38 | CCRO | CARRERA Y COZATL, | | | SCAC4 |
| 39 | CCRP | COSSENTINO CONTRACTING COMPANY INC | | | SCAC4 |
| 40 | CCRQ | CONCRETE EQUIP & SUPPLY CO | | | SCAC3 |
| 41 | CCRQ | COASTAL CARRIERS INC | | | SCAC4 |
| 42 | CCRR | Claremont Concord R.R. Corp. | added 1/1989; 1/1994-7/2000; eliminated 1/2004; 7/2005 | | NAKINA |
| 43 | CCRR | Claremont Concord R.R. Corp. | added 1/89; 1/94-7/2000 | | NRHS |
| 44 | CCRR | CLAREMONT CONCORD RAILROAD CORPORATION | | | PWRC |
| 45 | CCRR | Claremont Concord Railroad | | | RSRV |
| 46 | CCRR | CLAREMONT CONCORD RAILROAD CORPORAT | | | SCAC4 |
| 47 | CCRT | CLASSIC CAR CONNECTION, THE | | | SCAC4 |
| 48 | CCRU | EUROTAINER SA | | F | BIC |
| 49 | CCRU | COMPAGNIE DES CONTAINERS RESERVOIR | | | PWRC |
| 50 | CCRU | Compagnie Des Containers Reservoir | | | RSRV |
| 51 | CCRU | CIE DES CONTAINERS RESERVOIR | | | SCAC3 |
| 52 | CCRU | EUROTAINER SAS | | | SCAC4 |
| 53 | CCRV | CONCORD CARRIER INC | | | SCAC3 |
| 54 | CCRV | COAKLEY, C RELOCATION SYSTEMS | | | SCAC4 |
| 55 | CCRW | CONTINENTAL CARRIERS INC | | | SCAC3 |
| 56 | CCRW | CLASSIC CAR CRAFT LTD | | | SCAC4 |
| 57 | CCRX | Coastal Refining & Marketing, Inc. | 1/1994-7/2000 (not listed) | | NAKINA |
| 58 | CCRX | Consumers' Co-operative Refineries Ltd. | 7/1937 (not listed); 4/1938-1/1952; added 4/1953; 7/1954-4/1970; eliminated 4/1970 | | NAKINA |
| 59 | CCRX | Consumers' Co-operative Refineries Ltd. | 4/38-4/70; eliminated 4/70 | | NRHS |
| 60 | CCRX | Coastal Refining & Marketing, Inc. | 1/94-7/2000 | | NRHS |
| 61 | CCRX | *CONSUMERS' CO-OPERATIVE REFINERIES LTD. | | | PWRC |
| 62 | CCRX | *CAPE COD RAILROAD | | | PWRC |
| 63 | CCRX | *COASTAL REFINING & MARKETING, INC. | | | PWRC |
| 64 | CCRX | +CONTRACTORS CARGO CO. | | | PWRC |
| 65 | CCRX | Coastal Refining and Marketing | | | RSRV |
| 66 | CCRX | CONSUMERS CO-OPERATIVE REFINERIES L | | | SCAC3 |
| 67 | CCRX | CONTRACTORS CARGO CO | | | SCAC4 |
| 68 | CCRY | Charles City Ry. Lines, Inc. | added 1/1988; 1/1994-7/2005 | | NAKINA |
| 69 | CCRY | Charles City Ry. Lines, Inc. | added 1/88; 1/94-7/2000 | | NRHS |
| 70 | CCRY | CHARLES CITY RAILWAY LINES | | | PWRC |
| 71 | CCRY | Charles City Railway | | | RSRV |
| 72 | CCRY | CHARLES CITY RAIL LINES | | | SCAC3 |
| 73 | CCRY | CITY CARTON RECYCLING | | | SCAC4 |
| 74 | CCRZ | *CHICAGO COMMUTER RAIL SERVICE BOARD | | | PWRC |
| 75 | CCRZ | *KANSAS CITY SOUTHERN RWY [TNR] (RETIRED 02-06-92 ATP) | | | PWRC |
| 76 | CCRZ | Corinth and Counce Railroad (Kansas City Southern Railway) | | | RSRV |
