| 1 | CLT | Air Caribbean | IATA: XC, Callsign: Caribbean, Ceased operations on 23 October 2002. | NA | AVCODES |
| 2 | CLT | Caribbean Air Transport | IATA: CJ, Callsign: Caribbean, | NA | AVCODES |
| 3 | CLT | Caribbean Air Transport | | | ICAO1 |
| 4 | CLTA | L CASAS TRANSPORTES | | | SCAC4 |
| 5 | CLTB | CALA TRANSPORTATION, INC | | | SCAC3 |
| 6 | CLTB | CALA TRANSPORTATION INC | | | SCAC4 |
| 7 | CLTC | CLAUDES TRUCK & TRAILER SERVICE INC | | | SCAC3 |
| 8 | CLTC | CAPITAL TRUCKING | | | SCAC4 |
| 9 | CLTD | CENTRAL TRUCK LINES LIMITED | | | SCAC3 |
| 10 | CLTD | CALVILLO, L M TRUCKING | | | SCAC4 |
| 11 | CLTF | CLINTON TRANSFER & STORAGE COMPANY | | | SCAC3 |
| 12 | CLTF | COHO FARMS | | | SCAC4 |
| 13 | CLTG | CLIFFS TOWING LTD | | | SCAC4 |
| 14 | CLTH | CLOUTHIER, RONALD L INC | | | SCAC3 |
| 15 | CLTI | CLEARY TRUCKING | | | SCAC3 |
| 16 | CLTK | CASE, LONNIE, TRUCKING, INC | | | SCAC3 |
| 17 | CLTL | CLARK, BILL, TRUCK LINE, INC | | | SCAC3 |
| 18 | CLTM | CAROLINA TOURS UNLIMITED OF GARNER | | | SCAC3 |
| 19 | CLTN | CLAY TRUCKING INC | | | SCAC3 |
| 20 | CLTO | COOL TRANSPORTATION | | | SCAC3 |
| 21 | CLTO | CLASICA TORTILLERIA S A DE C V | | | SCAC4 |
| 22 | CLTP | CLARK TRUCKING COMPANY | | | SCAC3 |
| 23 | CLTQ | CLARKE TRAFFIC SERVICE | | | SCAC3 |
| 24 | CLTR | CLINTON TRANSFER, INC | | | SCAC3 |
| 25 | CLTR | CLEARY TRANSPORTATION COMPANY INC | | | SCAC4 |
| 26 | CLTS | CALENDAR TRANSPORT INC | | | SCAC4 |
| 27 | CLTT | COASTAL TRANSPORT CO INC | | | SCAC3 |
| 28 | CLTU | SOGECO INTERNATIONAL SA | | CH | BIC |
| 29 | CLTU | CHEMICAL LEAMAN TANK LINES INC. | | | PWRC |
| 30 | CLTU | Chemical Leaman Tank Lines | | | RSRV |
| 31 | CLTU | COING TAINER | | | SCAC3 |
| 32 | CLTU | COLT CONTAINER LEASING AND TRADING | | | SCAC4 |
| 33 | CLTV | CLOSE TRUCKING | | | SCAC3 |
| 34 | CLTV | C & L TOWING SERVICE INC | | | SCAC4 |
| 35 | CLTW | COLANDREA TRUCKING INC | | | SCAC3 |
| 36 | CLTW | CLT TRUCKING INC | | | SCAC4 |
| 37 | CLTX | Cloro de Tehuantepec, S.A. de C.V. | added 1/1988; eliminated 4/1989; 1/1994-7/2005 (not listed) | | NAKINA |
| 38 | CLTX | Cominco Ltd. | added 4/1967; eliminated 7/1968 | | NAKINA |
| 39 | CLTX | Union Tank Car Co. | added 7/1968; 4/1970; eliminated 4/1970 | | NAKINA |
| 40 | CLTX | Coltexo Corp. | 7/1935-4/1961; eliminated 1/1962 | | NAKINA |
| 41 | CLTX | Coltexo Corp. | 4/38-4/61; eliminated 1/62 | | NRHS |
| 42 | CLTX | Cominco Ltd. | added 4/67; eliminated 7/68 | | NRHS |
| 43 | CLTX | Union Tank Car Co. | added 7/68; 4/70; eliminated 4/70 | | NRHS |
| 44 | CLTX | Cloro de Tehuantepec, S.A. de C.V. | added 1/88; eliminated 4/89; 1/94-7/2000 | | NRHS |
| 45 | CLTX | *COLTEXO CORP. | | | PWRC |
| 46 | CLTX | *COMINCO LTD. (UNION TANK CAR CO.) | | | PWRC |
| 47 | CLTX | +CLORO DE TEHUANTEPEC, SA DE CV | | | PWRC |
| 48 | CLTX | Cloro de Tehuantepec de CV | | | RSRV |
| 49 | CLTY | CLEARFIELD TRANSPORTATION CO INC | | | SCAC3 |
