| 16001 | CST | Shoreline Aviation | Callsign: Shoreline, | USA | AVCODES |
| 16002 | CST | Coast Air | IATA: BX | | ICAO1 |
| 16003 | CSTA | COSTA, JOHN M | | | SCAC3 |
| 16004 | CSTB | CASTOR TRANSPORT LLC | | | SCAC4 |
| 16005 | CSTC | COAST TO COAST TRANSPORTATION INC | | | SCAC3 |
| 16006 | CSTC | CANSTAR TRUCKING CO LTD | | | SCAC4 |
| 16007 | CSTD | CHRISTIE TRANSPORT LIMITED | | | SCAC3 |
| 16008 | CSTE | CASTLE EXPRESS | | | SCAC3 |
| 16009 | CSTE | CASTLE EXPRESS | | | SCAC4 |
| 16010 | CSTF | C & S TRANSFER INC | | | SCAC3 |
| 16011 | CSTG | CROSS STATE TOWING SERVICE | | | SCAC3 |
| 16012 | CSTH | COSTICH, B. G.,& SONS, INC. | | | SCAC3 |
| 16013 | CSTH | CAL STATE TRANSPORTATION | | | SCAC4 |
| 16014 | CSTI | COAST TRANSPORTATION CO | | | SCAC3 |
| 16015 | CSTI | CUSTOM ICE INC | | | SCAC4 |
| 16016 | CSTK | CASA TRUCKING INC | | | SCAC4 |
| 16017 | CSTL | CITY OF St. LOUIS | | | PWRC |
| 16018 | CSTL | CASTLE ROCK TRANSFER | | | SCAC3 |
| 16019 | CSTL | CIRCLE S TRANSPORT LTD | | | SCAC4 |
| 16020 | CSTLP | Chicago, St. Louis & Pittsburgh Railroad | | USA | TRAFFIC |
| 16021 | CSTM | CRYSTAL TRANSPORTATION INC | | | SCAC3 |
| 16022 | CSTM | COOPER & SON TRANSPORTATION | | | SCAC4 |
| 16023 | CSTN | CASTINE MOTOR SERVICE | | | SCAC3 |
| 16024 | CSTN | CASTINE, FRANK L INC | | | SCAC4 |
| 16025 | CSTO | COAST MOVING AND STORAGE CO INC | | | SCAC3 |
| 16026 | CSTP | C & S TRANSPORTATION INC | | | SCAC3 |
| 16027 | CSTP | CORNERSTONE TRANSPORT LLC | | | SCAC4 |
| 16028 | CSTP | Consorzio Salernitano Trasporti Pubblici | City: Salerno | I | TRAFFIC |
| 16029 | CSTQ | CASCADE TRANSPORT INC | | | SCAC3 |
| 16030 | CSTQ | CASCADE TRANSPORT INC | | | SCAC4 |
| 16031 | CSTR | CHESTER TRANSFER, INC | | | SCAC3 |
| 16032 | CSTS | CHRISTENSEN BROTHERS | | | SCAC3 |
| 16033 | CSTS | CENTRAL STATES DISTRIBUTION SERVICE | | | SCAC4 |
| 16034 | CSTT | CAPSTICKS TRANSPORT INCORPORATED | | | SCAC4 |
| 16035 | CSTU | CONTAINER-SERVICE FRIEDRICH TIEMANN GMBH | | D | BIC |
| 16036 | CSTU | CONTAINER SERVICE FRIEDRICH TIEMANN | | | SCAC4 |
| 16037 | CSTV | C AND S TRANSPORT | | | SCAC3 |
| 16038 | CSTV | C & S TRUCKING & SALVAGE INC | | | SCAC4 |
| 16039 | CSTW | COASTWISE LINE | | | SCAC3 |
| 16040 | CSTX | Canada Starch Co. Inc. | added 4/1981; 1/1994; eliminated 1/1995; 7/2000-7/2005 | | NAKINA |
| 16041 | CSTX | Canada Starch Co., Ltd. | 7/1937-1/1980; eliminated 4/1981 | | NAKINA |
| 16042 | CSTX | Canada Starch Co., Ltd. | 4/38-1/80; eliminated 4/81 | | NRHS |
| 16043 | CSTX | Canada Starch Co. Inc. | added 4/81; 1/94; eliminated 1/95; 7/2000 | | NRHS |
| 16044 | CSTX | CANADA STARCH COMPANY INC. (CASCO) | | | PWRC |
| 16045 | CSTX | Canadian Starch (Casco) | | | RSRV |
| 16046 | CSTX | CANADA STARCH CO LTD THE | | | SCAC3 |
| 16047 | CSTX | CANADA STARCH COMPANY INC | | | SCAC4 |
| 16048 | CSTY | CASEYS TRUCKING SERVICE | | | SCAC3 |
| 16049 | CSTY | CHRISTY TRANSPORT LLC | | | SCAC4 |
| 16050 | CSU | Taxi Aereo Centro Sur, S.A. de C.V. | Callsign: Centrosur, | MEX | AVCODES |
| 16051 | CSU | Chari Aviation Services | Callsign: Chari Service, | TCH | AVCODES |
| 16052 | CSU | Chari Aviation Services | IATA: S8 | | ICAO1 |
| 16053 | CSUA | CASITA S A | | | SCAC4 |
| 16054 | CSUB | CARGO SOLUTIONS LLC | | | SCAC4 |
| 16055 | CSUC | CONSUMERS SUPPLY CORP | | | SCAC3 |
| 16056 | CSUC | CONCERT SYSTEMS USA INC | | | SCAC4 |
| 16057 | CSUG | CURTIS TRUCKING | | | SCAC3 |
| 16058 | CSUG | CURTIS, D P TRUCKING COMPANY | | | SCAC4 |
| 16059 | CSUI | CONSTRUCTION TRANSPORT INC | | | SCAC3 |
| 16060 | CSUI | CASTLE TRUCKING INC | | | SCAC4 |
| 16061 | CSUJ | C & S TRUCKING | | | SCAC4 |
| 16062 | CSUK | CARSON TRUCKING | | | SCAC3 |
| 16063 | CSUK | CHAHAL, SUKHPAL SINGH | | | SCAC4 |
| 16064 | CSUL | CHOICE SERVICES - USA LTD | | | SCAC3 |
| 16065 | CSUL | CONTAINER SOLUTIONS LLC | | | SCAC4 |
| 16066 | CSUM | CONSUME | | | SCAC4 |
| 16067 | CSUN | COBS TRUCKING | | | SCAC3 |
| 16068 | CSUN | CARIBBEAN SUN MOVERS INC | | | SCAC4 |
| 16069 | CSUO | CONSUMERS OIL COMPANY | | | SCAC3 |
| 16070 | CSUP | C S E TRUCKING CORP | | | SCAC3 |
| 16071 | CSUP | CARRIER SOLUTIONS LLC | | | SCAC4 |
| 16072 | CSUQ | COMMERCIAL SHUTTLE SERVICE INC | | | SCAC4 |
| 16073 | CSUR | C. C. SOUTHERN, INC | | | SCAC3 |
| 16074 | CSUS | CHASE-SPARROW TRANSPORTATION SERVIC | | | SCAC3 |
| 16075 | CSUS | CRITICAL SUPPLY SOLUTIONS | | | SCAC4 |
| 16076 | CSUT | CARRILLOS TRUCKING | | | SCAC4 |
| 16077 | CSUU | CONTAINER SPEDITIONS UND TRANSPORT GMBH | | D | BIC |
| 16078 | CSUU | CONTAINER SPEDITIONS UND TRANSPORT | | | SCAC3 |
| 16079 | CSUU | CONTAINER SPEDITIONS UND TRANSPORT | | | SCAC4 |
| 16080 | CSUV | CORPORATE SHUTTLE & LIMOUSINE SERVI | | | SCAC3 |
| 16081 | CSUV | CORPORATE SHUTTLE & LIMOUSINE SERVI | | | SCAC4 |
| 16082 | CSUX | City of Colorado Springs, Dept. of Electric Generation | eliminated 1/1999; 7/2000-7/2005 (not listed) | | NAKINA |
| 16083 | CSUX | City of Colorado Springs, Dept. of Public Utilities | added 7/1979; 1/1980-1/1994 | | NAKINA |
| 16084 | CSUX | The Continental Sugar Co. | 8/1920 | | NAKINA |
| 16085 | CSUX | City of Colorado Springs, Dept. of Public Utilities | added 7/79; 1/80-1/94 | | NRHS |
| 16086 | CSUX | City of Colorado Springs, Dept. of Electric Generation | eliminated 1/99; 7/2000 | | NRHS |
| 16087 | CSUX | CITY OF COLORADO SPRINGS, DEPT. OF ELECTRIC GENERATION | | | PWRC |
| 16088 | CSUX | City of Colorado Springs Department of Electric Generation | | | RSRV |
| 16089 | CSUX | CITY OF COLORADO SPRINGS, DEPT. OF | | | SCAC4 |
| 16090 | CSUY | CASCADE STONE SUPPLY | | | SCAC4 |
| 16091 | CSV | Air Service | Callsign: Cassovia Service, | SK | AVCODES |
| 16092 | CSV | Coastal Travels Limited | IATA: 7I, Callsign: Coastel Travel, IATA designator changed to CQ. | EAT | AVCODES |
| 16093 | CSV | Coastal Travels Limited | IATA: CQ, Callsign: Coastel Travel, IATA designator changed from 7I. | EAT | AVCODES |
| 16094 | CSV | Coastal Travels | | | ICAO1 |
| 16095 | CSV | CargoServ GmbH | | AT | VKM |
| 16096 | CSVA | C & S SILVER ARROW INC | | | SCAC3 |
| 16097 | CSVA | C & S SILVER ARROW INC | | | SCAC4 |
| 16098 | CSVB | CANSEA TRANSPORT INC | | | SCAC3 |
| 16099 | CSVB | CANSEA TRANSPORT INC | | | SCAC4 |
| 16100 | CSVC | C & H SERVICE MOBILE HOME TRANSPORT | | | SCAC3 |
