| 17401 | CTZG | COMMERCIAL TRANSPORTATION SERVICES | | | SCAC3 |
| 17402 | CTZG | CTS SPECIALIZED INC | | | SCAC4 |
| 17403 | CTZI | CITIZENS TRANSPORTATION CO INC | | | SCAC3 |
| 17404 | CTZJ | COAST TO COAST MOVING AND STORAGE | | | SCAC4 |
| 17405 | CTZL | CANTRELL TRUCKING | | | SCAC3 |
| 17406 | CTZM | CON-TRA-MAR | | | SCAC3 |
| 17407 | CTZM | CARLITOS TRUCK | | | SCAC4 |
| 17408 | CTZP | CONTAINER TRANSPORT | | | SCAC3 |
| 17409 | CTZP | CTA TRANSPORT LLC | | | SCAC4 |
| 17410 | CTZQ | CORNERSTONE TRANSPORT INC | | | SCAC4 |
| 17411 | CTZR | C T G TRANSPORT CO INC | | | SCAC3 |
| 17412 | CTZS | CTSI INC | | | SCAC3 |
| 17413 | CTZS | C TWO (C2) LOGISTICS SOLUTIONS LLC | | | SCAC4 |
| 17414 | CTZT | CITIZENS TRANSPORT INC | | | SCAC3 |
| 17415 | CTZT | CORRALES TRUCKING INC | | | SCAC4 |
| 17416 | CTZU | CTL CONTAINER TRANSPORT LOGISTIC | | | SCAC3 |
| 17417 | CTZU | CONTAINER TRANSPORT LOGISTIC GMBH | | | SCAC4 |
| 17418 | CTZY | CRAMARO TARPAULIN SYSTEMS LTD | | | SCAC4 |
| 17419 | CTZZ | CONTINENTAL TRANSPORTATION CO | | | PWRC |
| 17420 | CTZZ | Continental Transportation | | | RSRV |
| 17421 | CTZZ | CONTINENTAL TRANSPORTATION CO. | | | SCAC3 |
| 17422 | CU | Cubana de Aviacion, S.A. | ICAO: CUB, Callsign: Cubana, IATA Prefix: 136, Name changed from Empresa Consolidada Cubana de Aviacion | C | AVCODES |
| 17423 | CU | Empresa Consolidada Cubana de Aviacion | ICAO: CUB, Callsign: Cubana, IATA Prefix: 136, Name changed to Cubana de Aviacion, S.A. | C | AVCODES |
| 17424 | CUA | China United Airlines Co., Ltd. | IATA: KN, Callsign: Lianhang, ICAO Callsign changed to China United. Designator KN reinstated by IATA. | PRC | AVCODES |
| 17425 | CUA | China United Airlines Co., Ltd. | IATA: KN, Callsign: China United, ICAO Callsign changed from Lianhang. Designator KN reinstated by IATA. | PRC | AVCODES |
| 17426 | CUA | China United Airlines | IATA: HR | | ICAO1 |
| 17427 | CUAB | COSENTINO USA | | | SCAC4 |
| 17428 | CUAC | CONNECTICUT AMERICAN CHARTERS INC | | | SCAC3 |
| 17429 | CUAD | CUESTAS, ABRAM LOSANO & DAVID CASTI | | | SCAC3 |
| 17430 | CUAG | CUSTOM AIR TRUCKING, INC | | | SCAC3 |
| 17431 | CUAG | CUSTOM AIR TRUCKING INC | | | SCAC4 |
| 17432 | CUAI | CUSTOM TRUX | | | SCAC4 |
| 17433 | CUAK | CUSTOM LOGISTICS INC | | | SCAC4 |
| 17434 | CUAM | CURRIE-ALEX MOTORS LTD | | | SCAC3 |
| 17435 | CUAN | CURTIN, AUSTIN | | | SCAC3 |
| 17436 | CUAO | COUNTRY AUTO | | | SCAC3 |
| 17437 | CUAO | CULBERT FARMS | | | SCAC4 |
| 17438 | CUAR | CUELLAR & SON TRUCKING CORP | | | SCAC3 |
| 17439 | CUAT | CUSTOM APPLIANCE TRUCKING | | | SCAC3 |
| 17440 | CUAV | CONNECTION TRUCK & AUTO | | | SCAC4 |
| 17441 | CUAY | CURRIER TRAVEL AGENCY INC | | | SCAC3 |
| 17442 | CUB | Cubana de Aviacion, S.A. | IATA: CU, Callsign: Cubana, IATA Prefix: 136, Name changed from Empresa Consolidada Cubana de Aviacion | C | AVCODES |
| 17443 | CUB | Empresa Consolidada Cubana de Aviacion | IATA: CU, Callsign: Cubana, IATA Prefix: 136, Name changed to Cubana de Aviacion, S.A. | C | AVCODES |
| 17444 | CUB | Cubana de Aviación | IATA: CU | | ICAO1 |
| 17445 | CUB | Cubana de Aviacion | | C | TRAFFIC |
| 17446 | CUBA | COLUMBIA TRUCKING & RIGGING CO | | | SCAC3 |
| 17447 | CUBAB | | | C | TRAFFIC |
| 17448 | CUBAC | | | C | TRAFFIC |
| 17449 | CUBB | CUBAN CARIBBEAN SHIPPING INC. | | | SCAC3 |
| 17450 | CUBB | CAN TRUCKING INC | | | SCAC4 |
| 17451 | CUBC | CUBIC DE MEXICO S A DE C V | | | SCAC4 |
| 17452 | CUBD | CURBSIDE PLUS DELIVERY | | | SCAC4 |
| 17453 | CUBE | CURTICE BURNS EXPRESS, INC | | | SCAC3 |
| 17454 | CUBE | CUBEX LIMITED | | | SCAC4 |
| 17455 | CUBF | CUMBERLAND FREIGHT LINE INC | | | SCAC3 |
| 17456 | CUBF | CENTURY EXPEDITED SERVICES INC | | | SCAC4 |
| 17457 | CUBK | COLUMBIA TRUCK EXPRESS CORP | | | SCAC3 |
| 17458 | CUBN | CURL BROS INC | | | SCAC3 |
| 17459 | CUBO | CUBIO TRUCKING | | | SCAC3 |
| 17460 | CUBO | CWYNAR TRUCKING | | | SCAC4 |
| 17461 | CUBP | CUBE TRANSPORTATION, INC | | | SCAC3 |
| 17462 | CUBR | COBURNS TRANSPORTATION SYSTEMS | | | SCAC4 |
| 17463 | CUBT | CURTIS, BOB TRUCKING INC | | | SCAC3 |
| 17464 | CUBT | COURIER DISPATCH LTD | | | SCAC4 |
| 17465 | CUBU | CARU CONTAINERS BV | | NL | BIC |
| 17466 | CUBU | CURBELLO | | | SCAC3 |
| 17467 | CUBU | CURBELLO*R. G. | | | SCAC4 |
| 17468 | CUCB | COMMUNITY CAB CO | | | SCAC3 |
| 17469 | CUCB | CUTE COLLECTIBLES | | | SCAC4 |
| 17470 | CUCC | CLUB CAR COACH INC | | | SCAC3 |
| 17471 | CUCD | CONTRACT TRUCKING CANADA INC | | | SCAC3 |
| 17472 | CUCF | CUSHMAN CARTAGE & FLOAT INC | | | SCAC3 |
| 17473 | CUCG | COURY CARTAGE INC | | | SCAC3 |
| 17474 | CUCH | COUCHARA, JOHN HEAT & FUEL INC | | | SCAC4 |
| 17475 | CUCI | CONSTRUCTION CARRIERS INC | | | SCAC3 |
| 17476 | CUCL | CUSTER, C L LLC | | | SCAC4 |
| 17477 | CUCM | CURTIS CONTRACTING CO INC | | | SCAC3 |
| 17478 | CUCN | CUSTOM CARRIER, INC | | | SCAC3 |
| 17479 | CUCN | CASTURO, CHARLES INC | | | SCAC4 |
| 17480 | CUCO | CHOUTEAU OIL COMPANY | | | SCAC3 |
| 17481 | CUCP | COURTESY CAB CO | | | SCAC3 |
| 17482 | CUCQ | CUNNINGHAM CARTAGE INC | | | SCAC3 |
| 17483 | CUCR | CURRAN CARRIERS | | | SCAC3 |
| 17484 | CUCS | CUSTOMER COACH SERVICE | | | SCAC3 |
| 17485 | CUCU | SEACO SRL | | BDS | BIC |
| 17486 | CUCU | CARGO UNIT CONTAINERS LTD | | | SCAC3 |
| 17487 | CUCU | CRONOS CONTAINERS LTD | | | SCAC4 |
| 17488 | CUCV | C U TRANSIT COOPERATIVE | | | SCAC3 |
| 17489 | CUCW | CUSTOM CARRIERS INC | | | SCAC3 |
| 17490 | CUCY | CUSTOM CARRIERS/USA | | | SCAC3 |
| 17491 | CUDA | COEUR D'ALENE RESORT | | | SCAC3 |
| 17492 | CUDB | CUDDEBACK TRUCKING | | | SCAC3 |
| 17493 | CUDG | COURIER DISPATCH GROUP OF ALABAMA I | | | SCAC3 |
| 17494 | CUDG | CUSHING, D G CONSTRUCTION LTD | | | SCAC4 |
| 17495 | CUDI | CLOUD TRUCKING INC | | | SCAC3 |
| 17496 | CUDK | CLOUD TRUCKING | | | SCAC3 |
| 17497 | CUDL | CAULDER, LLOYD TRANSFER | | | SCAC3 |
| 17498 | CUDM | CALIFORNIA UNITED TERMINALS | | | SCAC3 |
| 17499 | CUDM | CALIFORNIA UNITED TERMINALS | | | SCAC4 |
| 17500 | CUDN | CURTIS, DUANE | | | SCAC3 |
