| 15501 | CSH | Shanghai Airlines | IATA: FM, Callsign: Shanghai Air, IATA Prefix: 774, Name changed to Shanghai Airlines Co. Ltd. IATA designator changed from SF* | PRC | AVCODES |
| 15502 | CSH | Shanghai Airlines | IATA: SF, Callsign: Shanghai Air, IATA designator changed to FM | PRC | AVCODES |
| 15503 | CSH | Shanghai Airlines Co. Ltd. | IATA: FM, Callsign: Shanghai Air, IATA Prefix: 774, Name changed from Shanghai Airlines. IATA designator changed from SF* | PRC | AVCODES |
| 15504 | CSH | Shanghai Airlines | IATA: FM | | ICAO1 |
| 15505 | CSH | Shanghai Airlines | | PRC | TRAFFIC |
| 15506 | CSHAV | ČSAD Havířov | | CZ | TRAFFIC |
| 15507 | CSHB | CLIPPER SHIPPING A/S | | | SCAC3 |
| 15508 | CSHC | CAROLINA SHIPPING CO INC | | | SCAC3 |
| 15509 | CSHC | CACTUS TRENCHING INC | | | SCAC4 |
| 15510 | CSHE | CONTINENTAL SHUTTLE INC | | | SCAC3 |
| 15511 | CSHF | COSBY, H F JR | | | SCAC3 |
| 15512 | CSHF | CARVAJAL FREIGHT SYSTEMS CORP | | | SCAC4 |
| 15513 | CSHG | COSMOS SHIPPING COMPANY | | | SCAC3 |
| 15514 | CSHG | COUNTRYSIDE HOLDINGS LTD | | | SCAC4 |
| 15515 | CSHH | COMMODORE SHIPPING CO LT. | | | SCAC3 |
| 15516 | CSHH | CROFTON TRANSPORT | | | SCAC4 |
| 15517 | CSHI | COSCO (H K) SHIPPING CO LTD | | | SCAC4 |
| 15518 | CSHK | CHINA SHIPPING (H K) MARINE CO LTD | | | SCAC4 |
| 15519 | CSHL | COASTAL HAWAIIAN LINES INC | | | SCAC3 |
| 15520 | CSHL | CLARDYS SPECIALIZED HAULING LLC | | | SCAC4 |
| 15521 | CSHM | CASHEN MOVING & STORAGE COMPANY INC | | | SCAC3 |
| 15522 | CSHM | COSHIPMAN | | | SCAC4 |
| 15523 | CSHN | CATHEDRAL SHIPPING COMPANY LIMITED, | | | SCAC3 |
| 15524 | CSHO | CONSOLIDATED SHOE COMPANY | | | SCAC3 |
| 15525 | CSHP | CONTAINERSHIPS INC | | | SCAC3 |
| 15526 | CSHP | CONTAINERSHIPS INC | | | SCAC4 |
| 15527 | CSHQ | CASHION COMPANY, INC | | | SCAC3 |
| 15528 | CSHR | CORPORATE SHIPPERS TRANSPORT INC | | | SCAC3 |
| 15529 | CSHS | CHILDERS SHOW HORSES | | | SCAC4 |
| 15530 | CSHT | CUSHMAN, BARNETT B TRUCKING | | | SCAC3 |
| 15531 | CSHU | CONTAINER SALES (UK) LTD | | GB | BIC |
| 15532 | CSHV | COUNTESS SHIPPING CO LTD. | | | SCAC3 |
| 15533 | CSHV | COUNTESS SHIPPING CO LTD. | | | SCAC4 |
| 15534 | CSHW | CHISHOLM TRAIL TRUCKING INC | | | SCAC3 |
| 15535 | CSHX | Columbia Steel & Shafting Co. | 7/1923-7/1930 | | NAKINA |
| 15536 | CSHX | COLUMBIA STEEL & SHAFTING CO. | | | PWRC |
| 15537 | CSI | Central Skyport, Inc. | Callsign: Skyport, | USA | AVCODES |
| 15538 | CSI | Capital Aviaition Services, Inc. | Callsign: Casi, | USA | AVCODES |
| 15539 | CSI | CSI Aviation, Inc. | Callsign: Pinon, ICAO Callsign changed to Sandia. | USA | AVCODES |
| 15540 | CSI | CSI Aviation, Inc. | Callsign: Sandia, ICAO Callsign changed from Pinon. | USA | AVCODES |
| 15541 | CSI | Central Skyport | | | ICAO1 |
| 15542 | CSI | CHAPIN & SADLER INC | | | SCAC4 |
| 15543 | CSIA | CUISINES INTERNATIONALES | | | SCAC4 |
| 15544 | CSIB | CSI TRANSPORT | | | SCAC3 |
| 15545 | CSIB | CRUZ SOLIS, PATRICIA | | | SCAC4 |
| 15546 | CSIC | CONTAINER SERVICES INT'L, INC. | | | SCAC3 |
| 15547 | CSIE | CHRISTIES MESSENGER SERVICE INC | | | SCAC3 |
| 15548 | CSIE | COURT STREET OFFICE SUPPLIES | | | SCAC4 |
| 15549 | CSIF | C S TRANSIT INC | | | SCAC3 |
| 15550 | CSIG | CHARACTER SHIPPING COMPANY LIMITED, | | | SCAC3 |
| 15551 | CSIH | CLASSIC HORSE TRANSPORTATION | | | SCAC3 |
| 15552 | CSIH | CONTINENTAL SERVICES INC | | | SCAC4 |
| 15553 | CSIJ | CCS IMPORTS INC | | | SCAC3 |
| 15554 | CSIJ | CYCLE SEARCH INTERNATIONAL INC | | | SCAC4 |
| 15555 | CSIL | CASILE, SALVATORE | | | SCAC3 |
| 15556 | CSIN | CONSOLIDATED SHIPPERS INC | | | SCAC3 |
| 15557 | CSIO | CSI INC | | | SCAC3 |
| 15558 | CSIP | C S TRANSPORT INC | | | SCAC3 |
| 15559 | CSIQ | COASTAL TRANSPORT INC | | | SCAC3 |
| 15560 | CSIR | CONSANI TRUCKING | | | SCAC3 |
| 15561 | CSIT | C S I TRUCKING INC | | | SCAC3 |
| 15562 | CSIU | CSI GROUP LLC | | USA | BIC |
| 15563 | CSIU | CSI Group | | | RSRV |
| 15564 | CSIU | CARRIER SYSTEMS, INC. | | | SCAC3 |
| 15565 | CSIV | CUSTOMER SERVICE TRUCKING CO INC | | | SCAC3 |
| 15566 | CSIW | COASTAL TRANSPORTATION INC | | | SCAC3 |
| 15567 | CSIX | Circle Systems, Inc. | 7/2005 | | NAKINA |
| 15568 | CSIX | Cook Swan Oil Corp. | 7/1930-7/1932 | | NAKINA |
| 15569 | CSIX | Cook & Swan Co., Inc. | 8/1920-7/1923 | | NAKINA |
| 15570 | CSIX | *COOK SWAN OIL CORP. [COOK & SWAN CO.] | | | PWRC |
| 15571 | CSIX | +CYCLE SYSTEMS, INC. | | | PWRC |
| 15572 | CSIY | CLASSIC TRANSPORTATION INC | | | SCAC3 |
| 15573 | CSIZ | CENTRAL SILICA | | | PWRC |
| 15574 | CSJ | Castle Aviation, Inc. | Callsign: Castle, | USA | AVCODES |
| 15575 | CSJ | Castle Aviation | | | ICAO1 |
| 15576 | CSJA | CARIBE SHIPPING COMPANY INC. | | | SCAC3 |
| 15577 | CSJC | CENTRAL STATES CARRIERS INC | | | SCAC3 |
| 15578 | CSJF | CAVALIER SHIPPING | | | SCAC3 |
| 15579 | CSJI | COOK, S J & SONS INC | | | SCAC3 |
| 15580 | CSJO | C & A TRANSPORT | | | SCAC3 |
| 15581 | CSJQ | COSTA, JOE, TRUCKING | | | SCAC3 |
| 15582 | CSJY | CONSOLIDATED SERVICES OF NJ INC | | | SCAC3 |
| 15583 | CSK | Flightcraft, Inc. | Callsign: Cascade, | USA | AVCODES |
| 15584 | CSK | Catskill Airways | Callsign: Catskill, | USA | AVCODES |
| 15585 | CSK | Flightcraft | | | ICAO1 |
| 15586 | CSKA | CLASSIC AIRPORT SHUTTLE | | | SCAC3 |
| 15587 | CSKB | CLEAN HARBORS OF NATICK INC | | | SCAC3 |
| 15588 | CSKC | CHESAPEAKE CHARTER INC | | | SCAC3 |
| 15589 | CSKD | CSK TANKERS PTE, LTD | | | SCAC3 |
| 15590 | CSKG | CHASE TRUCKING | | | SCAC3 |
| 15591 | CSKK | C & C TRANSPORTATION INC | | | SCAC3 |
| 15592 | CSKL | CHRIS TRUCK LINE, R. A. Christopher, INC | | | SCAC3 |
| 15593 | CSKM | C & S TRUCKING | | | SCAC3 |
| 15594 | CSKN | CASSLE TRUCKING | | | SCAC3 |
| 15595 | CSKO | C S & S TRUCKING CORP | | | SCAC3 |
| 15596 | CSKQ | CHEASPEAKE OPERATING CO | | | SCAC3 |
| 15597 | CSKR | C&S R.R. Corp. | 1/1994-7/2005 | | NAKINA |
| 15598 | CSKR | C&S R.R. Corp. | 1/94-7/2000 | | NRHS |
| 15599 | CSKR | CARBON & SCHUYKILL RAILROAD (C & S RAILROAD) | | | PWRC |
| 15600 | CSKR | C and S Railroad | | | RSRV |
