| 1 | CLF | Bristol Flying Centre Limited | Callsign: Clifton, Name changed to Centreline AV Limited. | GB | AVCODES |
| 2 | CLF | Centreline AV Limited | Callsign: Clifton, Name changed Bristol Flying Centre Limited. | GB | AVCODES |
| 3 | CLF | Bristol Flying Centre | | | ICAO1 |
| 4 | CLF | Cooperativa Linee Ferroviari | | I | TRAFFIC |
| 5 | CLF | Costruzioni Linee Ferroviarie S.p.A. | | IT | VKM |
| 6 | CLFA | CLIFTON TRANSFER AND CARTAGE INC | | | SCAC3 |
| 7 | CLFB | CONSOLIDATED FIBRES INC | | | SCAC3 |
| 8 | CLFB | CROSSROADS TRAILER RENTALS INC | | | SCAC4 |
| 9 | CLFC | CLIFF INDUSTRIES INC | | | SCAC3 |
| 10 | CLFD | CAR-LAW FREIGHT SYSTEMS | | | SCAC3 |
| 11 | CLFD | CENTRAL FEEDS INC | | | SCAC4 |
| 12 | CLFE | CALIFORNIA REFRIGERATED EXPRESS | | | SCAC3 |
| 13 | CLFF | COLLIS, FRED F & SONS INC | | | SCAC4 |
| 14 | CLFH | CALIFORNIA FREIGHT TRANSPORT | | | SCAC3 |
| 15 | CLFI | CALIFORNIA TRANSFER AND STORAGE INC | | | SCAC3 |
| 16 | CLFK | CLIFTON, JOE TRUCKING LLC | | | SCAC4 |
| 17 | CLFM | CLIFTON MOVERS | | | SCAC3 |
| 18 | CLFN | CLIFFORD, BERT TRANSPORT INC | | | SCAC3 |
| 19 | CLFO | CALIFORNIA MOVERS EXPRESS INC | | | SCAC3 |
| 20 | CLFP | CLIFFS TRANSPORTATION | | | SCAC3 |
| 21 | CLFQ | CLIFS CARTAGE INC | | | SCAC3 |
| 22 | CLFQ | CHEMAS TRUCKING LLC | | | SCAC4 |
| 23 | CLFR | C L MOTOR FREIGHT INC | | | SCAC3 |
| 24 | CLFR | CLARK FREIGHTWAYS | | | SCAC4 |
| 25 | CLFT | CLIFTON TRUCKING | | | SCAC4 |
| 26 | CLFU | CARGO LINK INTERNATIONAL PTE LTD | | | SCAC4 |
| 27 | CLFV | CLIFFS VAN & STORAGE | | | SCAC3 |
| 28 | CLFW | CLIFFORD, W INC | | | SCAC4 |
| 29 | CLFY | CLASS FREIGHT LINES | | | SCAC3 |
