| 15601 | CSKR | C & S RAILROAD CORPORATION | | | SCAC3 |
| 15602 | CSKS | CONSTANT OIL CO | | | SCAC3 |
| 15603 | CSKU | SHOUKANG MEDICAL SCIENCE AND TECHNOLOGY (SHANDONG) CO., LTD. | | PRC | BIC |
| 15604 | CSKU | CONSOLIDATED SERVICES, INC. | | | PWRC |
| 15605 | CSKU | Consolidated Services | | | RSRV |
| 15606 | CSKU | CONSOLIDATION SERVICES, INC | | | SCAC3 |
| 15607 | CSKX | Central States Enterprises, Inc. | added 1/1981; eliminated 4/1982 | | NAKINA |
| 15608 | CSKX | Central States Grain & Trading Co. | added 10/1979; 1/1980; eliminated 1/1981 | | NAKINA |
| 15609 | CSKX | Central States Grain & Trading Co. | 1/80; eliminated 1/81 | | NRHS |
| 15610 | CSKX | Central States Enterprises, Inc. | added 1/81; eliminated 4/82 | | NRHS |
| 15611 | CSKX | CENTRAL STATES ENTERPRISES, INC. [CENTRAL STATES GRAIN & TRADING CO.} | | | PWRC |
| 15612 | CSKY | COLLINS, SHARON KAY | | | SCAC3 |
| 15613 | CSL | Minson Aviation, Inc. d/b/a California Air Shuttle (Oxnard,Ca) | Callsign: California Shuttle, | USA | AVCODES |
| 15614 | CSL | Casair Aviation Ltd. | IATA: KS, Callsign: Casair, | GB | AVCODES |
| 15615 | CSL | California Air Shuttle | | | ICAO1 |
| 15616 | CSL | ISG South Chicago & Indiana Harbor Ry. Co. d/b/a South Chicago & Indiana Harbor Ry. Co. | 7/2005 | | NAKINA |
| 15617 | CSL | Chicago Short Line R.R. Co. | 1/1975-7/2000; eliminated 10/2002 | | NAKINA |
| 15618 | CSL | Chicago Short Line R.R. Co. | 1/75-7/2000 | | NRHS |
| 15619 | CSL | ISG SOUTH CHICAGO & INDIANA HARBOR RWY. CO. [CHICAGO SHORT LINE RAILWAY COMPANY] | | | PWRC |
| 15620 | CSL | Chicago Short Line Railway | | | RSRV |
| 15621 | CSL | Chicago Surface Lines | | USA | TRAFFIC |
| 15622 | CSLA | CONSOLIDATED DUMP TRANSPORTATION CO | | | SCAC3 |
| 15623 | CSLB | CONSOLIDATED FILM SERVICE | | | SCAC3 |
| 15624 | CSLC | CASTER STORAGE & LEASING CO | | | SCAC3 |
| 15625 | CSLE | CONSOLODATED TRANSFER & WAREHOUSE C | | | SCAC3 |
| 15626 | CSLG | CONSOLIDATED TRUCK SERVICE INC | | | SCAC3 |
| 15627 | CSLH | CONSOLIDATED VAN & STORAGE COMPANIE | | | SCAC3 |
| 15628 | CSLI | CSX INTERMODAL, INC. | | | PWRC |
| 15629 | CSLI | CSX INTERMODAL INC | | | SCAC3 |
| 15630 | CSLK | CONSTRUCTION HAULAGE CORP | | | SCAC3 |
| 15631 | CSLL | CRISTELLI, PAT TRUCKING | | | SCAC3 |
| 15632 | CSLM | CASTLE LEASING INC | | | SCAC3 |
| 15633 | CSLMV | Letecky Oddíl Ministerstva Vnitra | | CS | TRAFFIC |
| 15634 | CSLN | CRESCO LINES INC | | | SCAC3 |
| 15635 | CSLO | COASTAL TRANSFER CO | | | SCAC3 |
| 15636 | CSLQ | CASE TRUCK LINE | | | SCAC3 |
| 15637 | CSLR | CASELLA TRANSPORTATION INC | | | SCAC3 |
| 15638 | CSLR | City&South London Railway | City: London, Tube | GB | TRAFFIC |
| 15639 | CSLS | COAST-LINE EXPRESS CO, THE (CLX) | | | SCAC3 |
| 15640 | CSLU | COSCO SHIPPING DEVELOPMENT (ASIA) CO.,LTD | | HK | BIC |
| 15641 | CSLU | COMMODORE SHIPPING CO., LTD | | | SCAC3 |
| 15642 | CSLV | COSTILL TRUCKING INC | | | SCAC3 |
| 15643 | CSLW | COASTAL LOWBED HAULING INC | | | SCAC3 |
| 15644 | CSLX | Holcim (Canada) Inc. | added 1/2010 | | NAKINA |
| 15645 | CSLX | Ciment St-Laurent | added 7/2007; eliminated 1/2010 | | NAKINA |
| 15646 | CSLX | Concrete Supply Co. | added 1/1975; 1/1975; eliminated 1/1980 | | NAKINA |
| 15647 | CSLX | Concrete Supply Co. | added 1/75; 1/75; eliminated 1/80 | | NRHS |
| 15648 | CSLX | *CONCRETE SUPPLY CO. | | | PWRC |
| 15649 | CSLX | *CAREY SHORT LINE CORP. | | | PWRC |
| 15650 | CSLX | +CIMENT ST-LAURENT | | | PWRC |
| 15651 | CSM | Ratkhan Air | Callsign: Lorry, Name changed from Aeroservice-Sabit | KZ | AVCODES |
| 15652 | CSM | Aeroservice-Sabit | Callsign: Lorry, Name changed to Ratkhan Air | KZ | AVCODES |
| 15653 | CSM | Chosonmihang CAA of DPR of Korea | IATA: JS, Callsign: Juliett Sierra, ICAO designator changed to KCA | PRK | AVCODES |
| 15654 | CSM | Ratkhan Air | | | ICAO1 |
| 15655 | CSMC | CHRISTMAN TRUCKING CO | | | SCAC3 |
| 15656 | CSMD | COLIN SIM CARTAGE LTD | | | SCAC3 |
| 15657 | CSMF | CONSOLIDATED MOTOR FREIGHT TERMINAL | | | SCAC3 |
| 15658 | CSMG | COASTAL MOVING & STORAGE OF NORTHWE | | | SCAC3 |
| 15659 | CSMH | COPPERSTATE MOVING COMPANY | | | SCAC3 |
| 15660 | CSMI | COSBY, M W COMPANY INC | | | SCAC3 |
| 15661 | CSMJ | CS MED SHIPPING | | | SCAC3 |
| 15662 | CSMK | CIRCLE S TRANSPORTATION INC | | | SCAC3 |
| 15663 | CSML | CASSIE MOTOR LINES INC | | | SCAC3 |
| 15664 | CSMO | CARR, SAM TRUCKING | | | SCAC3 |
| 15665 | CSMP | COSMOS TRANSPORT SERVICES COMPANY | | | SCAC3 |
| 15666 | CSMQ | CHRISMAN, DRUE INC | | | SCAC3 |
| 15667 | CSMR | CONSUMERS SUPPLY COMPANY | | | SCAC3 |
| 15668 | CSMS | COASTAL MOVING & STORAGE | | | SCAC3 |
| 15669 | CSMT | CUSTOM TRANSPORT | | | SCAC3 |
| 15670 | CSMU | CRYO-LEASE, LLC | | USA | BIC |
| 15671 | CSMW | CASCADE MOVING & STORAGE INC | | | SCAC3 |
| 15672 | CSMX | Carol & Andy Muller | added 10/1996; eliminated 7/2000; 7/2000-7/2005 (not listed) | | NAKINA |
| 15673 | CSMX | Chestnut & Smith Corp. | 8/1920-7/1930 | | NAKINA |
| 15674 | CSMX | Carol & Andy Muller | added 10/96; 7/2000; eliminated 7/2000 | | NRHS |
| 15675 | CSMX | *CHESTNUT & SMITH CORP. | | | PWRC |
| 15676 | CSMX | *CALERA & SHELBY RAILROAD & MUSEUM, INC. | | | PWRC |
| 15677 | CSMX | +CAROL & ANDY MULLER | | | PWRC |
| 15678 | CSMX | Carol and Andy Muller | | | RSRV |
| 15679 | CSMX | Carol and Andy Muller | | USA | TRAFFIC |
| 15680 | CSMY | CASTLETON MARITIME CORPORATION (LIB | | | SCAC3 |
| 15681 | CSN | China Southern Airlines | IATA: CZ, Callsign: China Southern, IATA Prefix: 784, Formerly CAAC Guangzhow region | PRC | AVCODES |
| 15682 | CSN | China Southern Airlines | IATA: CZ | | ICAO1 |
| 15683 | CSN | China Southern Airlines | | PRC | TRAFFIC |
| 15684 | CSNB | CLASSIC TRANSPORTATION COMPANY BROK | | | SCAC3 |
| 15685 | CSNC | CASING TRANSPORTATION INC | | | SCAC3 |
| 15686 | CSND | COMMERCIAL STORAGE & DISTRIBUTION C | | | SCAC3 |
| 15687 | CSNG | CASINO MANAGEMENT INC | | | SCAC3 |
| 15688 | CSNG | COSCO SINGAPORE PTE LTD | | | SCAC4 |
| 15689 | CSNH | CONRAD & SON TRUCKING | | | SCAC3 |
| 15690 | CSNI | COLEMAN & SON TRUCKING | | | SCAC3 |
| 15691 | CSNI | CONSTRUCK TRANSPORT INC | | | SCAC4 |
| 15692 | CSNJ | CHASTA MOTOR TRANSPORTATION COMPANY | | | SCAC3 |
| 15693 | CSNJ | CASANAS CORP | | | SCAC4 |
| 15694 | CSNL | CRESCENT TRANSPORT INC | | | SCAC4 |
| 15695 | CSNM | CAST NORTH AMERICA 83 (TRUCKING) LT | | | SCAC3 |
| 15696 | CSNN | CTC SALES INC | | | SCAC3 |
| 15697 | CSNN | CROSS TRANSPORTATION INC | | | SCAC4 |
| 15698 | CSNO | CASINO TRUCKING CORP | | | SCAC3 |
| 15699 | CSNP | CISSNA PARK TILE | | | SCAC3 |
| 15700 | CSNP | C AND S EQUINE TRANSPORT | | | SCAC4 |
