| 1 | LEC | Elicomo | Callsign: Elicomo, | I | AVCODES |
| 2 | LEC | Linex | Callsign: Leca, | RCA | AVCODES |
| 3 | LEC | Linex | | | ICAO1 |
| 4 | LECB | LEISURE CAB CO | | | SCAC3 |
| 5 | LECB | LAMOTTE, DIRK | | | SCAC4 |
| 6 | LECC | LEE, CONTRACT CARRIERS | | | SCAC3 |
| 7 | LECD | LES ENTREPRISES CNR | | | SCAC4 |
| 8 | LECE | LUCY ENTERPRISES CORP | | | SCAC4 |
| 9 | LECG | LEGETTE, CECIL G | | | SCAC3 |
| 10 | LECH | LEACHS EXPRESS | | | SCAC3 |
| 11 | LECI | LEES COACH TOURS | | | SCAC3 |
| 12 | LECJ | LIGHTHOUSE ENTERPRISES | | | SCAC4 |
| 13 | LECK | LEE, CHUCK TRUCKING INC | | | SCAC3 |
| 14 | LECL | LES ENTREPRISES SERGE BARRETTE INC | | | SCAC4 |
| 15 | LECN | LES ENTREPRISES CARVON INC | | | SCAC3 |
| 16 | LECN | LEV TRANSPORT INC | | | SCAC4 |
| 17 | LECO | LEDERER TERMINAL WAREHOUSE COMPANY | | | SCAC3 |
| 18 | LECP | LECO CORPORATION | | | SCAC3 |
| 19 | LECQ | LARIMAR ENVIOS AND CARGO EXPRESS IN | | | SCAC4 |
| 20 | LECR | LECHMERE INC | | | SCAC3 |
| 21 | LECU | INDUSTRIAL DYNAMICS | | RH | BIC |
| 22 | LECU | Lehigh Equipment | | | RSRV |
| 23 | LECV | LECCO ENTERPRISES | | | SCAC4 |
| 24 | LECW | LESLIE EQUIPMENT COMPANY | | | SCAC4 |
| 25 | LECX | Leco Corp. | added 4/1981; eliminated 5/1983; 1/1994 (not listed) | | NAKINA |
| 26 | LECX | Leco Corp. | added 4/81; eliminated 5/83; 1/94 | | NRHS |
| 27 | LECX | LECO CORPORATION | | | PWRC |
| 28 | LECX | Leco Corporation | | | RSRV |
| 29 | LECZ | LOVELAND ELEVATOR COMPANY | | | PWRC |
| 30 | LECZ | PKS Łęczyca | | PL | TRAFFIC |
