| 1 | CSC | Sichuan Airlines Co. Ltd. | IATA: N8, Callsign: Chuanhang, IATA designator changed to 3U | PRC | AVCODES |
| 2 | CSC | Caribbean Skyways St. Lucia Express | IATA: SL, Callsign: St. Lucia Express, | WL | AVCODES |
| 3 | CSC | Sichuan Airlines Co. Ltd. | IATA: 3U, Callsign: Sichuan, IATA designator changed from N8 | PRC | AVCODES |
| 4 | CSC | Sichuan Airlines | IATA: 3U | | ICAO1 |
| 5 | CSC | CHICAGO SIGHTSEEING COMPANY INC | | | SCAC4 |
| 6 | CSCA | CHESTER CARTAGE LTD | | | SCAC4 |
| 7 | CSCB | CASCO BAY LINES | | | SCAC3 |
| 8 | CSCC | C&S CARTAGE | | | SCAC3 |
| 9 | CSCD | Cascade and Columbia River R.R. Co. | added 10/1999; 7/2000-7/2005; eliminated 4/2006 | | NAKINA |
| 10 | CSCD | Cascade and Columbia River R.R. Co. | added 10/99; 7/2000 | | NRHS |
| 11 | CSCD | CASCADE & COLUMBIA RIVER RAILROAD | | | PWRC |
| 12 | CSCD | Cascade and Columbia River Railroad | | | RSRV |
| 13 | CSCD | CASCADE AND COLUMBIA RIVER RAILROAD | | | SCAC4 |
| 14 | CSCE | C & S COACHES | | | SCAC3 |
| 15 | CSCE | CONTRACTORS SERVICE COMPANY INC | | | SCAC4 |
| 16 | CSCF | C S SERVICE INC | | | SCAC3 |
| 17 | CSCG | CONDRA SCHIFFAHRTS GMBH & CO KG MS | | | SCAC4 |
| 18 | CSCI | CASTOR, C C TRUCKING | | | SCAC3 |
| 19 | CSCI | COSCAN INTERNATIONAL INC | | | SCAC4 |
| 20 | CSCK | C S C TRUCKING INC | | | SCAC3 |
| 21 | CSCM | COASTAL CARRIERS INC | | | SCAC3 |
| 22 | CSCN | COSMOPOLITAN CARRIERS INC | | | SCAC3 |
| 23 | CSCN | CSC OIL TRANSPORTATION(S) PTE LTD | | | SCAC4 |
| 24 | CSCO | CONSOLIDATED CONTAINER CORP | | | SCAC3 |
| 25 | CSCO | CUSTOM COURIER SYSTEMS INC | | | SCAC4 |
| 26 | CSCP | CISCO TRUCKING COMPANY | | | SCAC3 |
| 27 | CSCP | CARTERET SHIPPING/CARTERET SHIP AGE | | | SCAC4 |
| 28 | CSCQ | CORALUZZO SAMUEL CO INC | | | SCAC3 |
| 29 | CSCQ | CORALUZZO, SAMUEL CO INC | | | SCAC4 |
| 30 | CSCS | CONSUMERS COOPERATIVE SOCIETY | | | SCAC4 |
| 31 | CSCT | CSC TRANSPORT | | | SCAC4 |
| 32 | CSCU | CONTAINER SOLUTIONS CO LLC | | UAE | BIC |
| 33 | CSCU | SCANDINAVIAN CARGO SEA | | | SCAC4 |
| 34 | CSCV | CS TRANSPORT CORP | | | SCAC3 |
| 35 | CSCV | CSC SUGAR LLC | | | SCAC4 |
| 36 | CSCW | COSTCO WHOLESALE | | | SCAC4 |
| 37 | CSCX | Coal Supply Corp. | added 10/1990; 1/1994-7/2005 | | NAKINA |
| 38 | CSCX | Oglebay Norton Co. | added 4/1982; eliminated 4/1989 | | NAKINA |
| 39 | CSCX | Central Silica Co. | added 10/1970; 1/1975-1/1980; eliminated 4/1982 | | NAKINA |
| 40 | CSCX | Hewitt Transportation Co. | 4/1938 | | NAKINA |
| 41 | CSCX | The Cincinnati Soap Co. (Hewitt Transportation Co.) | 7/1937 | | NAKINA |
| 42 | CSCX | The Cincinnati Soap Co. | 7/1935 | | NAKINA |
| 43 | CSCX | The Cincinnati Soap Co. (Hewitt Transportation Co.) | Apr-38 | | NRHS |
| 44 | CSCX | Central Silica Co. | added 10/70; 1/75-1/80; eliminated 4/82 | | NRHS |
| 45 | CSCX | Oglebay Norton Co. | added 4/82; eliminated 4/89 | | NRHS |
| 46 | CSCX | Coal Supply Corp. | added 10/90; 1/94-7/2000 | | NRHS |
| 47 | CSCX | *HEWITT TRANSPORTATION {CINCINNATI SOAP CO.} | | | PWRC |
| 48 | CSCX | *OGLEBAY NORTON CO. {CENTRAL SILICA CO.} | | | PWRC |
| 49 | CSCX | *CITISTEEL CORP. | | | PWRC |
| 50 | CSCX | +COAL SUPPLY CORPORATION | | | PWRC |
| 51 | CSCX | Coal Supply Corporation | | | RSRV |
| 52 | CSCX | COAL SUPPLY CORPORATION | | | SCAC4 |
| 53 | CSCY | CASS CITY OIL & GAS CO | | | SCAC4 |
| 54 | CSCZ | CAIN STEEL | | | PWRC |
