| 1 | CLI | Air Club International Ltd. | Callsign: Air Club, Established in 1993. Commenced operations in Janaury 1995. Ceased operations during 1998. | CDN | AVCODES |
| 2 | CLI | Clickair S.A. | IATA: XG, Meregd with Vueling Airlines S.A. Low cost subsidary of Iberia | E | AVCODES |
| 3 | CLI | Calima Aviacion | IATA: XG | | ICAO1 |
| 4 | CLI | CONCORD TRAILWAYS | | | SCAC4 |
| 5 | CLIA | CENTERLINE TRANSPORTATION INC | | | SCAC4 |
| 6 | CLIB | COMPANDIA LIBRA DE NAVEGACAO BRAZIL | | | SCAC3 |
| 7 | CLIB | COMPANHIA LIBRA DE NAVEGACAO | | | SCAC4 |
| 8 | CLIC | CLICK MESSENGER SERVICE INC | | | SCAC3 |
| 9 | CLID | C & L TRANSPORT INC | | | SCAC3 |
| 10 | CLID | CALI EXPRESS | | | SCAC4 |
| 11 | CLIE | CLIENT TRANSPORT INC | | | SCAC4 |
| 12 | CLIF | Cliffside R.R. Co. | 1/1975-1/1994 | | NAKINA |
| 13 | CLIF | Cliffside R.R. Co. | 1/75-1/94 | | NRHS |
| 14 | CLIF | RETIRED 12-23-92 (181) ATP [CLIFFSIDE RAILROAD] | | | PWRC |
| 15 | CLIF | Cliffside Railroad | | | RSRV |
| 16 | CLIF | CLIFFSIDE RAILROAD COMPANY | | | SCAC3 |
| 17 | CLIF | CLIFFE PRINTING INC | | | SCAC4 |
| 18 | CLIG | CLINGERMAN TRUCKING COMPANY | | | SCAC3 |
| 19 | CLIH | CLINE, HAROLD G INC | | | SCAC3 |
| 20 | CLII | COMET LINES | | | SCAC3 |
| 21 | CLIJ | CHARLES LIMOUSINE | | | SCAC3 |
| 22 | CLIJ | CHARGER LOGISTICS INC | | | SCAC4 |
| 23 | CLIK | CLIK TRUCKING | | | SCAC3 |
| 24 | CLIL | COLLINS, WILLIAM R INC | | | SCAC3 |
| 25 | CLIM | CLYMER TRANSFER COMPANY | | | SCAC3 |
| 26 | CLIM | CIRCLE LOGISTICS INC | | | SCAC4 |
| 27 | CLIN | CONASA LINES | | | PWRC |
| 28 | CLIN | CL-LINE | | | SCAC3 |
| 29 | CLIN | CARLTON TRANSPORT INC | | | SCAC4 |
| 30 | CLIN | Countryliner | | GB | TRAFFIC |
| 31 | CLIO | CALICO TRANSFER & STORAGE INC | | | SCAC3 |
| 32 | CLIR | CALIFORNIA RICE TRANSPORT INC | | | SCAC3 |
| 33 | CLIR | C & L REPAIR INC | | | SCAC4 |
| 34 | CLIS | COLLINS & SONS TRUCKING CO | | | SCAC3 |
| 35 | CLIU | CLBT S.R.L | | I | BIC |
| 36 | CLIU | CONTAINER LLOYD (USA) INC | | | SCAC3 |
| 37 | CLIU | COGEFRIN SPA | | | SCAC4 |
| 38 | CLIW | COLUMBUS LINE | | | PWRC |
| 39 | CLIW | COLUMBUS LINES INC | | | SCAC3 |
| 40 | CLIX | Calumet Lubricants | 7/2000 (not listed) | | NAKINA |
| 41 | CLIX | Calumet Lubricants, Inc. | added 4/2001; 7/2005 | | NAKINA |
| 42 | CLIX | Choctaw Leasing, Inc. | added 1/1964; 7/1965-10/1966; eliminated 4/1968 | | NAKINA |
| 43 | CLIX | Choctaw Leasing, Inc. | 7/65-10/66; eliminated 4/68 | | NRHS |
| 44 | CLIX | Calumet Lubricants | Jul-00 | | NRHS |
| 45 | CLIX | Calumet Lubricants, Inc. | added 4/2001 | | NRHS |
| 46 | CLIX | *CHOCTAW LEASING, INC. | | | PWRC |
| 47 | CLIX | +CALUMET LUBRICANTS | | | PWRC |
| 48 | CLIX | Calumet Lubricants | | | RSRV |
| 49 | CLIX | CHOCTAW LEASING INC | | | SCAC3 |
| 50 | CLIX | CALUMET LUBRICANTS | | | SCAC4 |
