| 1 | CU | Cubana de Aviacion, S.A. | ICAO: CUB, Callsign: Cubana, IATA Prefix: 136, Name changed from Empresa Consolidada Cubana de Aviacion | C | AVCODES |
| 2 | CU | Empresa Consolidada Cubana de Aviacion | ICAO: CUB, Callsign: Cubana, IATA Prefix: 136, Name changed to Cubana de Aviacion, S.A. | C | AVCODES |
| 3 | CUA | China United Airlines Co., Ltd. | IATA: KN, Callsign: Lianhang, ICAO Callsign changed to China United. Designator KN reinstated by IATA. | PRC | AVCODES |
| 4 | CUA | China United Airlines Co., Ltd. | IATA: KN, Callsign: China United, ICAO Callsign changed from Lianhang. Designator KN reinstated by IATA. | PRC | AVCODES |
| 5 | CUA | China United Airlines | IATA: HR | | ICAO1 |
| 6 | CUAB | COSENTINO USA | | | SCAC4 |
| 7 | CUAC | CONNECTICUT AMERICAN CHARTERS INC | | | SCAC3 |
| 8 | CUAD | CUESTAS, ABRAM LOSANO & DAVID CASTI | | | SCAC3 |
| 9 | CUAG | CUSTOM AIR TRUCKING, INC | | | SCAC3 |
| 10 | CUAG | CUSTOM AIR TRUCKING INC | | | SCAC4 |
| 11 | CUAI | CUSTOM TRUX | | | SCAC4 |
| 12 | CUAK | CUSTOM LOGISTICS INC | | | SCAC4 |
| 13 | CUAM | CURRIE-ALEX MOTORS LTD | | | SCAC3 |
| 14 | CUAN | CURTIN, AUSTIN | | | SCAC3 |
| 15 | CUAO | COUNTRY AUTO | | | SCAC3 |
| 16 | CUAO | CULBERT FARMS | | | SCAC4 |
| 17 | CUAR | CUELLAR & SON TRUCKING CORP | | | SCAC3 |
| 18 | CUAT | CUSTOM APPLIANCE TRUCKING | | | SCAC3 |
| 19 | CUAV | CONNECTION TRUCK & AUTO | | | SCAC4 |
| 20 | CUAY | CURRIER TRAVEL AGENCY INC | | | SCAC3 |
| 21 | CUB | Cubana de Aviacion, S.A. | IATA: CU, Callsign: Cubana, IATA Prefix: 136, Name changed from Empresa Consolidada Cubana de Aviacion | C | AVCODES |
| 22 | CUB | Empresa Consolidada Cubana de Aviacion | IATA: CU, Callsign: Cubana, IATA Prefix: 136, Name changed to Cubana de Aviacion, S.A. | C | AVCODES |
| 23 | CUB | Cubana de Aviación | IATA: CU | | ICAO1 |
| 24 | CUB | Cubana de Aviacion | | C | TRAFFIC |
| 25 | CUBA | COLUMBIA TRUCKING & RIGGING CO | | | SCAC3 |
| 26 | CUBAB | | | C | TRAFFIC |
| 27 | CUBAC | | | C | TRAFFIC |
| 28 | CUBB | CUBAN CARIBBEAN SHIPPING INC. | | | SCAC3 |
| 29 | CUBB | CAN TRUCKING INC | | | SCAC4 |
| 30 | CUBC | CUBIC DE MEXICO S A DE C V | | | SCAC4 |
| 31 | CUBD | CURBSIDE PLUS DELIVERY | | | SCAC4 |
| 32 | CUBE | CURTICE BURNS EXPRESS, INC | | | SCAC3 |
| 33 | CUBE | CUBEX LIMITED | | | SCAC4 |
| 34 | CUBF | CUMBERLAND FREIGHT LINE INC | | | SCAC3 |
| 35 | CUBF | CENTURY EXPEDITED SERVICES INC | | | SCAC4 |
| 36 | CUBK | COLUMBIA TRUCK EXPRESS CORP | | | SCAC3 |
| 37 | CUBN | CURL BROS INC | | | SCAC3 |
| 38 | CUBO | CUBIO TRUCKING | | | SCAC3 |
| 39 | CUBO | CWYNAR TRUCKING | | | SCAC4 |
| 40 | CUBP | CUBE TRANSPORTATION, INC | | | SCAC3 |
| 41 | CUBR | COBURNS TRANSPORTATION SYSTEMS | | | SCAC4 |
| 42 | CUBT | CURTIS, BOB TRUCKING INC | | | SCAC3 |
| 43 | CUBT | COURIER DISPATCH LTD | | | SCAC4 |
| 44 | CUBU | CARU CONTAINERS BV | | NL | BIC |
| 45 | CUBU | CURBELLO | | | SCAC3 |
| 46 | CUBU | CURBELLO*R. G. | | | SCAC4 |
| 47 | CUCB | COMMUNITY CAB CO | | | SCAC3 |
| 48 | CUCB | CUTE COLLECTIBLES | | | SCAC4 |
| 49 | CUCC | CLUB CAR COACH INC | | | SCAC3 |
| 50 | CUCD | CONTRACT TRUCKING CANADA INC | | | SCAC3 |
| 51 | CUCF | CUSHMAN CARTAGE & FLOAT INC | | | SCAC3 |
| 52 | CUCG | COURY CARTAGE INC | | | SCAC3 |
| 53 | CUCH | COUCHARA, JOHN HEAT & FUEL INC | | | SCAC4 |
| 54 | CUCI | CONSTRUCTION CARRIERS INC | | | SCAC3 |
| 55 | CUCL | CUSTER, C L LLC | | | SCAC4 |
| 56 | CUCM | CURTIS CONTRACTING CO INC | | | SCAC3 |
| 57 | CUCN | CUSTOM CARRIER, INC | | | SCAC3 |
| 58 | CUCN | CASTURO, CHARLES INC | | | SCAC4 |
| 59 | CUCO | CHOUTEAU OIL COMPANY | | | SCAC3 |
| 60 | CUCP | COURTESY CAB CO | | | SCAC3 |
| 61 | CUCQ | CUNNINGHAM CARTAGE INC | | | SCAC3 |
| 62 | CUCR | CURRAN CARRIERS | | | SCAC3 |
| 63 | CUCS | CUSTOMER COACH SERVICE | | | SCAC3 |
| 64 | CUCU | SEACO SRL | | BDS | BIC |
| 65 | CUCU | CARGO UNIT CONTAINERS LTD | | | SCAC3 |
| 66 | CUCU | CRONOS CONTAINERS LTD | | | SCAC4 |
| 67 | CUCV | C U TRANSIT COOPERATIVE | | | SCAC3 |
| 68 | CUCW | CUSTOM CARRIERS INC | | | SCAC3 |
| 69 | CUCY | CUSTOM CARRIERS/USA | | | SCAC3 |
| 70 | CUDA | COEUR D'ALENE RESORT | | | SCAC3 |
| 71 | CUDB | CUDDEBACK TRUCKING | | | SCAC3 |
| 72 | CUDG | COURIER DISPATCH GROUP OF ALABAMA I | | | SCAC3 |
| 73 | CUDG | CUSHING, D G CONSTRUCTION LTD | | | SCAC4 |
| 74 | CUDI | CLOUD TRUCKING INC | | | SCAC3 |
| 75 | CUDK | CLOUD TRUCKING | | | SCAC3 |
| 76 | CUDL | CAULDER, LLOYD TRANSFER | | | SCAC3 |
| 77 | CUDM | CALIFORNIA UNITED TERMINALS | | | SCAC3 |
| 78 | CUDM | CALIFORNIA UNITED TERMINALS | | | SCAC4 |
| 79 | CUDN | CURTIS, DUANE | | | SCAC3 |
| 80 | CUDO | CURTIS & DURRANT OIL COMPANY | | | SCAC4 |
| 81 | CUDR | CRUSADER CHARTERS | | | SCAC3 |
| 82 | CUDW | CUSHMAN, DAVID WILLIAM | | | SCAC3 |
| 83 | CUDX | Cudahy Car Lines | 7/1937-4/1938 | | NAKINA |
| 84 | CUDX | Cudahy Car Lines | Apr-38 | | NRHS |
| 85 | CUDX | CUDAHY CAR LINES | | | PWRC |
| 86 | CUDY | CUDDY INTERNATIONAL CORPORATION | | | SCAC3 |
| 87 | CUEA | COLORADO-UTE ELECTRIC ASSOCIATION | | | PWRC |
| 88 | CUEA | CUELLAR TRANSPORTATION CO INC | | | SCAC3 |
| 89 | CUEC | COURIER CONNECTION | | | SCAC3 |
| 90 | CUED | CULLIP, EDGAR | | | SCAC3 |
| 91 | CUED | COURIER DIRECT INC | | | SCAC4 |
| 92 | CUEE | COUNT THREE INC | | | SCAC3 |
| 93 | CUEH | CEI TRANSPORT | | | SCAC4 |
| 94 | CUEI | COURIER EXPRESS INC | | | SCAC3 |
| 95 | CUEL | CAN/USA EXPEDITE LTD | | | SCAC3 |
| 96 | CUEO | COSTA, EUGENE P & SONS | | | SCAC4 |
| 97 | CUEP | COURIER EXPRESS INC | | | SCAC3 |
| 98 | CUEQ | CRAFT USED EQUIPMENT INC | | | SCAC3 |
| 99 | CUER | CURTIS EXPRESS INC | | | SCAC3 |
| 100 | CUES | CUESTRA TRANSPORTATION | | | SCAC3 |
