| 16201 | CSXE | CSX Transportation End Of Train Devices | | | RSRV |
| 16202 | CSXF | CALLIS TRANSPORTATION INC | | | SCAC4 |
| 16203 | CSXG | CSL EXPRESS LINE | | | SCAC4 |
| 16204 | CSXH | CS TRANSPORT LTD | | | SCAC4 |
| 16205 | CSXI | CSX TRUCKING INC | | | SCAC3 |
| 16206 | CSXI | CLASSIC EXPRESS INC | | | SCAC4 |
| 16207 | CSXJ | COAST TRANSPORTATION | | | SCAC4 |
| 16208 | CSXL | CSX LINES | | | SCAC3 |
| 16209 | CSXL | CANADIAN STAR EXPRESS LTD | | | SCAC4 |
| 16210 | CSXM | CTS TRANSPORTS LLC | | | SCAC4 |
| 16211 | CSXN | CASCADE EXPRESS INC | | | SCAC3 |
| 16212 | CSXN | C & S EXPRESS INC | | | SCAC4 |
| 16213 | CSXO | CSX INTERMODAL, INC | | | SCAC3 |
| 16214 | CSXO | CSX INTERMODAL INC | | | SCAC4 |
| 16215 | CSXQ | CITY STAR EXPRESS LTD | | | SCAC4 |
| 16216 | CSXR | CUSTOMS EXPRESS INC | | | SCAC3 |
| 16217 | CSXT | CSX Transportation, Inc. | added 10/1987; 1/1994-7/2005 | | NAKINA |
| 16218 | CSXT | CSX Transportation, Inc. | added 10/87; 1/94-7/2000 | | NRHS |
| 16219 | CSXT | CSX TRANSPORTATION, INC. | | | PWRC |
| 16220 | CSXT | CSX Transportation | | | RSRV |
| 16221 | CSXT | CSX TRANSPORTATION | | | SCAC3 |
| 16222 | CSXT | CSX TRANSPORTATION | | | SCAC4 |
| 16223 | CSXU | CSX TRANSPORTATION, INC. | | | PWRC |
| 16224 | CSXU | CSX Transportation | | | RSRV |
| 16225 | CSXU | CSX TRANSPORTATION INC | | | SCAC4 |
| 16226 | CSXW | CSK TRANSPORT LLC | | | SCAC4 |
| 16227 | CSXX | Canadian Salt Co., Ltd. (Canadian Industries Ltd.) | 7/1930 | | NAKINA |
| 16228 | CSXX | Canadian Salt Co., Ltd. | 7/1923 | | NAKINA |
| 16229 | CSXX | CANADIAN INDUSTRIES LTD. [CANADIAN SALT CO.] | | | PWRC |
| 16230 | CSXX | C & S EXPRESS INC | | | SCAC3 |
| 16231 | CSXY | CARRS TRANSPORT INC | | | SCAC4 |
| 16232 | CSXZ | CSX TRANSPORTATION, INC. | | | PWRC |
| 16233 | CSXZ | CSX Transportation | | | RSRV |
| 16234 | CSXZ | CSX TRANSPORTATION | | | SCAC4 |
| 16235 | CSY | Shuangyang General Aviation Co. | Callsign: Shuangyany, | PRC | AVCODES |
| 16236 | CSY | Shuangyang General Aviation | | | ICAO1 |
| 16237 | CSYB | COLTRANS SYSTEMS INC | | | SCAC3 |
| 16238 | CSYC | CONTINENTAL SYSTEMS CONCEPTS OF NOR | | | SCAC3 |
| 16239 | CSYD | CARGO SYSTEMS INC | | | SCAC4 |
| 16240 | CSYE | COURTESY EXPRESS | | | SCAC3 |
| 16241 | CSYF | COURTESY TRANSFER & STORAGE | | | SCAC3 |
| 16242 | CSYG | CREASY TRANSPORT | | | SCAC3 |
| 16243 | CSYI | COURIER SYSTEMS INC | | | SCAC3 |
| 16244 | CSYM | CARRIER SYSTEMS INC | | | SCAC3 |
| 16245 | CSYN | COAST TRANSPORTATION SYSTEMS, INC | | | SCAC3 |
| 16246 | CSYN | CASEYS SERVICES COMPANY | | | SCAC4 |
| 16247 | CSYO | CASEYS OFFICE MOVING SERVICES INC | | | SCAC3 |
| 16248 | CSYP | CONTROL TRANSPORT SYSTEM INC | | | SCAC3 |
| 16249 | CSYP | CES EXPRESS | | | SCAC4 |
| 16250 | CSYR | CASEY RESOURCES | | | SCAC3 |
| 16251 | CSYT | CHRYSLER TRANSPORT INC | | | SCAC3 |
| 16252 | CSYT | CHRYSLER GROUP TRANSPORT LLC | | | SCAC4 |
| 16253 | CSYU | CORDELIA CONTAINER SHIPPING LINE LIMITED | | CY | BIC |
| 16254 | CSYU | TEXTAINER SERVICES LTD. | | | SCAC3 |
| 16255 | CSYW | CASSIDY, P | | | SCAC3 |
| 16256 | CSYX | Bunge North America | added 7/2004; 7/2005 | | NAKINA |
| 16257 | CSYX | Central Soya Co., Inc. | added 4/1997; 7/2000; eliminated 7/2004 | | NAKINA |
| 16258 | CSYX | Creosote Supply Co., Ltd. | 8/1920-7/1923 | | NAKINA |
| 16259 | CSYX | Central Soya Co., Inc. | added 4/97; 7/2000 | | NRHS |
| 16260 | CSYX | *CREOSOTE SUPPLY CO., LTD. | | | PWRC |
| 16261 | CSYX | +BUNGE NORTH AMERICA [CENTRAL SOYA COMPANY INC] | | | PWRC |
| 16262 | CSYX | Central Soya | | | RSRV |
| 16263 | CSYX | BUNGE NORTH AMERICA INC | | | SCAC4 |
| 16264 | CSYX | Central Soya Co., Inc. | | USA | TRAFFIC |
| 16265 | CSYZ | CSX CORPORATION | | | PWRC |
| 16266 | CSZ | Shenzhen Airlines | IATA: 4G, Callsign: Shenzhen Air, IATA designator to changed to ZH w.e.f. 04 March 2002. Designator 4G reinstated by IATA | PRC | AVCODES |
| 16267 | CSZ | Shenzhen Airlines | IATA: ZH, Callsign: Shenzhen Air, IATA Prefix: 479, IATA designator to changed from 4G w.e.f. 04 March 2002. Designator 4G reinstated by IATA | PRC | AVCODES |
| 16268 | CSZ | Shenzhen Airlines | IATA: ZH | | ICAO1 |
| 16269 | CSZ | Shenzen Airlines | | PRC | TRAFFIC |
| 16270 | CSZA | CLAUSON, SUZANNE B | | | SCAC4 |
| 16271 | CSZC | COSCO INC | | | SCAC3 |
| 16272 | CSZC | CANADIAN SPECIALIZED CARRIERS | | | SCAC4 |
| 16273 | CSZE | CARRISOZA EXPRESS | | | SCAC4 |
| 16274 | CSZG | COAST TO COAST CARGO INC | | | SCAC4 |
| 16275 | CSZH | COSCO SHENZHEN | | | SCAC4 |
| 16276 | CSZI | CLAMTASTIC SEAFOOD INC | | | SCAC4 |
| 16277 | CSZL | COASTALTOP SHIPPING LTD | | | SCAC3 |
| 16278 | CSZN | CAROLINA SOUTHERN TRUCKING INC | | | SCAC4 |
| 16279 | CSZO | COAST TO COAST TRANSPORT LLC | | | SCAC4 |
| 16280 | CSZP | CHARIS SHIPPING CORPORATION | | | SCAC3 |
| 16281 | CSZP | CSS TRANSPORT | | | SCAC4 |
| 16282 | CSZQ | CAROLINA SOUTHERN INC | | | SCAC4 |
| 16283 | CSZS | CUSTOM SANDBLASTED SIGNS | | | SCAC4 |
| 16284 | CSZT | CURTS TRUCKING | | | SCAC3 |
| 16285 | CSZT | CERCIELLO SPECIALIZED TRANSPORTATIO | | | SCAC4 |
| 16286 | CSZU | CONTAINER STORAGE | | USA | BIC |
| 16287 | CT | Air Sofia | ICAO: SFB, Callsign: Air Sofia, IATA Prefix: 551, Closed down by Bulgarian Authorites on 05 March 2007. | BG | AVCODES |
| 16288 | CT | Northwestern Air Lease Ltd. | ICAO: PLR, Callsign: Polaris, IATA Desigantor changed to J3 | CDN | AVCODES |
| 16289 | CT | Air One Cityliner S.p.A. | ICAO: CYL, Callsign: Cityliner, Name changed to Alitalia Cityliner S.p.A. w.e.f. 20 April 2011. Founded June 2006 | I | AVCODES |
| 16290 | CT | Alitalia Cityliner S.p.A. | ICAO: CYL, Callsign: Cityliner, Name changed from Air One Cityliner S.p.A. w.e.f. 20 April 2011. | I | AVCODES |
| 16291 | CT | Air Atlanta Europe Limited | ICAO: AAE, Callsign: Euroviking, IATA Prefix: 317, Established on 09 December 2020. | M | AVCODES |
| 16292 | CT | City of Columbia d/b/a Columbia Terminal | added 1/1988; eliminated 7/1989; added 1/1988; 1/1994-7/2005 | | NAKINA |
| 16293 | CT | City of Columbia d/b/a Columbia Terminal | added 1/88; eliminated 7/89; added 1/88; 1/94-7/2000 | | NRHS |
| 16294 | CT | CITY OF COLUMBIA D/B/A COLUMBIA TERMINAL RAILROAD CO. | | | PWRC |
| 16295 | CT | Columbia Terminal | | | RSRV |
| 16296 | CT | COLUMBIA TERMINAL | | | SCAC4 |
| 16297 | CT | Central Trains Ltd. | 1999: standard gauge, electrified at 25kV 50Hz | GB | TRAFFIC |
| 16298 | CT | Central Trains | | UK | VKM |
| 16299 | CT&S | Cairo, Truman & Southern R.R. Co. | 7/1923-7/1932 | | NAKINA |
| 16300 | CT&S | Cairo, Truman & Southern R.R. Co. | 23-Jul | | NRHS |
