| 1 | LOA | Sukhumi Airways | Callsign: Loreksi, | GE | AVCODES |
| 2 | LOA | Lonestar Airways | Callsign: Loneair, | LB | AVCODES |
| 3 | LOA | Missouri Pacific System | eliminated 1/1981 | | NAKINA |
| 4 | LOA | Missouri Pacific Railroad Co. | added 1/1977; 1/1980 | | NAKINA |
| 5 | LOA | Texas and Pacific Railway Co. | 1/1975; eliminated 1/1977 | | NAKINA |
| 6 | LOA | Texas and Pacific Railway Co. | 1/75; eliminated 1/77 | | NRHS |
| 7 | LOA | Missouri Pacific Railroad Co. | added 1/77; 1/80 | | NRHS |
| 8 | LOA | Missouri Pacific System | eliminated 1/81 | | NRHS |
| 9 | LOA | MISSOURI PACIFIC RAILROAD CO. [TEXAS & PACIFIC RWY. CO.] | | | PWRC |
| 10 | LOAC | LOOMIS ARMORED CAR SERVICE LTD | | | SCAC3 |
| 11 | LOAC | LONDON STAIRCASE INC | | | SCAC4 |
| 12 | LOAD | LOAD MASTERS | | | SCAC3 |
| 13 | LOAD | LOAD MASTERS | | | SCAC4 |
| 14 | LOAE | LOADSTAR INC | | | SCAC4 |
| 15 | LOAG | LOTT, ARLO G TRUCKING INC | | | SCAC3 |
| 16 | LOAG | LOTT, ARLO G TRUCKING INC | | | SCAC4 |
| 17 | LOAI | LOAD-IT | | | SCAC3 |
| 18 | LOAJ | LOOMIS ARMORED CAR SERVICE INC | | | SCAC3 |
| 19 | LOAM | Louisiana Midland Ry. Co. | added 7/1974; 1/1975-1/1980; eliminated 1/1987 | | NAKINA |
| 20 | LOAM | Louisiana Midland Ry. Co. | added 7/74; 1/75-1/80; eliminated 1/87 | | NRHS |
| 21 | LOAM | LOUISIANA MIDLAND RAILWAY CO. | | | PWRC |
| 22 | LOAM | Louisiana Midland Railway | | | RSRV |
| 23 | LOAM | Louisiana Midland Ry. Co. | | USA | TRAFFIC |
| 24 | LOAN | LOERA ARCEO, JR ROLANDO NOEL | | | SCAC4 |
| 25 | LOAO | LOCKPORT CHEMICAL COMPANY INC | | | SCAC3 |
| 26 | LOAQ | LOURASH CONSTRUCTION INC | | | SCAC3 |
| 27 | LOAS | LOS ANGELES SEATTLE LTL EXPRESS | | | SCAC3 |
| 28 | LOAS | LOPEZ JAQUEZ, JULIAN | | | SCAC4 |
| 29 | LOAT | LOA TRANSPORT | | | SCAC4 |
| 30 | LOAX | American Refrigerator Transit Co. | added 4/1963; 7/1965-1/1975; eliminated 10/1976 | | NAKINA |
| 31 | LOAX | American Refrigerator Transit Co. | 7/65-1/75 | | NRHS |
| 32 | LOAX | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
