| 17301 | CTWH | CASA TOWING | | | SCAC4 |
| 17302 | CTWI | CTR WAREHOUSE & TRUCKING INC | | | SCAC3 |
| 17303 | CTWJ | CTL | | | SCAC4 |
| 17304 | CTWK | CROUSE TRUCKING INC | | | SCAC3 |
| 17305 | CTWK | CAMPBELLS TOWING | | | SCAC4 |
| 17306 | CTWL | CROSSTOWN TRUCKING INC | | | SCAC3 |
| 17307 | CTWL | CANAM TOOLS WINDSOR LTD | | | SCAC4 |
| 17308 | CTWN | CORT TRADESHOW AND EVENT FURNISHING | | | SCAC4 |
| 17309 | CTWO | CENTRAL TERMINAL WAREHOUSE & TRUCKI | | | SCAC3 |
| 17310 | CTWP | CONNECTICUT WASTE PROCESSING INC | | | SCAC3 |
| 17311 | CTWQ | CENTRAL WAREHOUSE COMPANY | | | SCAC3 |
| 17312 | CTWQ | CHAMPION TIRE & WHEEL INC | | | SCAC4 |
| 17313 | CTWR | C-TWO (C-2) FREIGHT RESOURCES INC | | | SCAC4 |
| 17314 | CTWS | COWTOWN EXPRESS INC | | | SCAC4 |
| 17315 | CTWT | CTW | | | SCAC4 |
| 17316 | CTWU | SEACUBE CONTAINERS LLC | | USA | BIC |
| 17317 | CTWU | CONTAINER TRADING CO. | | | PWRC |
| 17318 | CTWU | Container Trading | | | RSRV |
| 17319 | CTWV | COLEMAN TRANSPORTATION | | | SCAC4 |
| 17320 | CTWW | CHATHAM TOWING COMPANY, | | | SCAC3 |
| 17321 | CTWW | CONSOLIDATED TRANSPORTATION WORLD I | | | SCAC4 |
| 17322 | CTWX | Conshohocken Rail LLC | added 1/2008 | | NAKINA |
| 17323 | CTWX | CONSHOHOCKEN RAIL, LLC | | | PWRC |
| 17324 | CTWX | CONSHOHOCKEN RAIL LLC | | | SCAC4 |
| 17325 | CTWY | CENTRAL STATES TRAILWAYS | | | SCAC4 |
| 17326 | CTX | Corporate Air Fleet, Inc. | Callsign: Catbird, | USA | AVCODES |
| 17327 | CTX | Cen-Tex Airlines, Inc. | Callsign: Cen-Tex, | USA | AVCODES |
| 17328 | CTX | Caterpillar Tractor Co. | 1/1950-1/1952; eliminated 1/1953 | | NAKINA |
| 17329 | CTX | Central Texas Refining Co. | 7/1930-7/1932 | | NAKINA |
| 17330 | CTX | Crescent Tank Line (General Chemical Co.) | 8/1920 | | NAKINA |
| 17331 | CTX | Caterpillar Tractor Co. | 1/52; eliminated 1/53 | | NRHS |
| 17332 | CTX | *GENERAL CHEMICAL CO. [CRESCENT TANK LINE] | | | PWRC |
| 17333 | CTX | *CENTRAL TEXAS REFINING CO. | | | PWRC |
| 17334 | CTX | *CATERPILLAR TRACTOR CO. | | | PWRC |
| 17335 | CTXB | CHEROKE TRUCK BROKERS LLC | | | SCAC4 |
| 17336 | CTXD | CAN-TEX INDUSTRIES (DIV OF HARSCO C | | | SCAC3 |
| 17337 | CTXD | CAN-TEX INC | | | SCAC4 |
| 17338 | CTXE | CITY TAXI | | | SCAC3 |
| 17339 | CTXE | CTE EXPRESS INC | | | SCAC4 |
| 17340 | CTXF | CAL-TEX TRUCKING INC | | | SCAC3 |
| 17341 | CTXF | CAN TRANS XPRESS INC | | | SCAC4 |
| 17342 | CTXG | CROSSTOWN EXPEDITING | | | SCAC3 |
| 17343 | CTXH | CTX-LAMBIE INC | | | SCAC4 |
| 17344 | CTXI | CA-TRUST TRANSPORTATION SERVICES | | | SCAC4 |
| 17345 | CTXJ | CONTEX TRANSPORT INC | | | SCAC3 |
| 17346 | CTXJ | CENTRAL TEXAS TRAILS | | | SCAC4 |
| 17347 | CTXL | CAS TRANSPORTATION INC | | | SCAC3 |
| 17348 | CTXL | CTX LOGISTICS INC | | | SCAC4 |
| 17349 | CTXN | CTX-TL INC | | | SCAC4 |
| 17350 | CTXP | CALTEX TANKER CO PTY SYDNEY AUSTRAL | | | SCAC3 |
| 17351 | CTXP | CNR TRANSPORT INC | | | SCAC4 |
| 17352 | CTXQ | CAL-TEX TRUCKING CANADA-USA LTD | | | SCAC3 |
| 17353 | CTXQ | CAL-TEX TRUCKING CANADA-USA LTD | | | SCAC4 |
| 17354 | CTXR | C T EXPRESS INC | | | SCAC3 |
| 17355 | CTXT | CAR-TEX TRANSPORT & VACUUM SERVICE | | | SCAC3 |
| 17356 | CTXT | CARTEL TRANSPORT LLC | | | SCAC4 |
| 17357 | CTXU | CONTAINEX CONTAINER -HANDELSGESELLSCHAFT MBH | | A | BIC |
| 17358 | CTXU | CONTAINEX CONTAINEX CONTAINER DEPOT | | | SCAC3 |
| 17359 | CTXU | CONTAINEX CONTAINER -HANDELSGESELLS | | | SCAC4 |
| 17360 | CTXV | COUNTRY TRUCKING & EXCAVATING INC | | | SCAC3 |
| 17361 | CTXV | CAL-TEX AUTO MOVERS INC | | | SCAC4 |
| 17362 | CTXW | CTX DIVISION OF CT TRANSPORT | | | SCAC3 |
| 17363 | CTXW | CARGO TRANSPORT WORLD | | | SCAC4 |
| 17364 | CTY | Cryderman Air Service | Callsign: Century, | USA | AVCODES |
| 17365 | CTY | Cryderman Air Service | | | ICAO1 |
| 17366 | CTYA | CITY DELIVERY SERVICE, INC | | | SCAC3 |
| 17367 | CTYA | COUNTRY LANE MINIATURES | | | SCAC4 |
| 17368 | CTYB | CITY DELIVERY SERVICE, INC | | | SCAC3 |
| 17369 | CTYB | CITY DELIVERY SERVICE INC | | | SCAC4 |
| 17370 | CTYC | CITY OIL CO INC | | | SCAC4 |
| 17371 | CTYD | CITY DASH INC | | | SCAC3 |
| 17372 | CTYD | CITY DASH INC | | | SCAC4 |
| 17373 | CTYE | COUNTY EXPRESS, INC | | | SCAC3 |
| 17374 | CTYE | CONTINENTAL TRANSPORT INC | | | SCAC4 |
| 17375 | CTYF | CITY ICE & FUEL COMPANY OF POINT PL | | | SCAC4 |
| 17376 | CTYH | CITRAN | | | SCAC3 |
| 17377 | CTYI | COUNTY MATERIALS CO INC | | | SCAC3 |
| 17378 | CTYI | CITY TO CITY COURIER INC | | | SCAC4 |
| 17379 | CTYJ | CITY TRANSFER | | | SCAC3 |
| 17380 | CTYJ | CITY TRANSFER | | | SCAC4 |
| 17381 | CTYM | CITY MILL SUPPLIES, INC | | | SCAC3 |
| 17382 | CTYO | CITY TOURS INC | | | SCAC3 |
| 17383 | CTYO | CITY OCEAN LOGISTICS CO LTD | | | SCAC4 |
| 17384 | CTYR | CITY TRANSFER CO | | | SCAC4 |
| 17385 | CTYS | COUNTRYSIDE HIDES INC | | | SCAC4 |
| 17386 | CTYT | CITY TANK LINE, INC | | | SCAC3 |
| 17387 | CTYV | CITY TRAVEL | | | SCAC3 |
| 17388 | CTYY | CITY TRANSFER & STORAGE CO. | | | SCAC3 |
| 17389 | CTYY | CITY TRANSFER & STORAGE CO INC | | | SCAC4 |
| 17390 | CTZ | CATA Lineas Aereas | Callsign: Cata, Founded in 1986. Ceased operations during 2006. Declared bankrupt on 28 March 2008. Name changed from CATA S.A.C.I.F.I. | RA | AVCODES |
| 17391 | CTZ | CATA S.A.C.I.F.I. | Callsign: Cata, Name changed to CATA Lineas Aereas | RA | AVCODES |
| 17392 | CTZ | CATA Línea Aérea | | | ICAO1 |
| 17393 | CTZA | CONNECT TRANSPORT CORPORATION | | | SCAC4 |
| 17394 | CTZB | CAPITAL TRANSPORT SERVICE LLC | | | SCAC4 |
| 17395 | CTZC | COAST TO COAST FREIGHT SYSTEMS INC | | | SCAC3 |
| 17396 | CTZC | CITIZENS LLC | | | SCAC4 |
| 17397 | CTZD | CONTENDER ONE LTD. | | | SCAC3 |
| 17398 | CTZE | CORTEZ ESPINO, HECTOR | | | SCAC4 |
| 17399 | CTZF | C T S | | | SCAC3 |
| 17400 | CTZF | CORTEZ ABREGO, RAFAEL | | | SCAC4 |
