| 1 | LSO | Aerolineas Del Sol, S.A. de C.V. | Callsign: Lineas Sol, | MEX | AVCODES |
| 2 | LSO | Lone Star Communications, Inc. | Callsign: Starcom, | USA | AVCODES |
| 3 | LSO | Louisiana Southern Ry. Co. | 1/1975-1/1980 | | NAKINA |
| 4 | LSO | Louisiana Southern Ry. Co. (Southern Ry. System) | 10/1966 | | NAKINA |
| 5 | LSO | Louisiana Southern Ry. | 4/1938-7/1965 | | NAKINA |
| 6 | LSO | Louisiana Southern Ry. (N.O.T.&M. Ry. Co., Lessee) | 7/1923 | | NAKINA |
| 7 | LSO | Louisiana Southern Ry. | 4/38-7/65 | | NRHS |
| 8 | LSO | Louisiana Southern Ry. Co. (Southern Ry. System) | Oct-66 | | NRHS |
| 9 | LSO | Louisiana Southern Ry. Co. | 1/75-1/80 | | NRHS |
| 10 | LSO | NORFOLK SOUTHERN [SOUTHERN; LOUISIANA SOUTHERN RY.] | | | PWRC |
| 11 | LSO | Louisiana Southern Railway | | | RSRV |
| 12 | LSOA | LOGISTICS SERVICES OF AMERICA | | | SCAC4 |
| 13 | LSOC | LA-SHER OIL CO INC | | | SCAC4 |
| 14 | LSON | LOGISTICS SOLUTIONS OF NORTH CAROLI | | | SCAC4 |
| 15 | LSOP | L & S TRANSPORT | | | SCAC3 |
| 16 | LSOR | LESSORS INC | | | SCAC3 |
| 17 | LSOR | LESSORS INC | | | SCAC4 |
| 18 | LSOT | LANCASTER & SONS TRUCKING CO INC | | | SCAC3 |
| 19 | LSOV | LONE STAR OVERNIGHT | | | SCAC4 |
| 20 | LSOX | General American Transportation Corp. | 1/1946-4/1947 | | NAKINA |
| 21 | LSOX | Lake States Oil Co. | 1/1945 | | NAKINA |
| 22 | LSOX | LAKE STATES OIL CO. (GENERAL AMERICAN TRANSPORTATION CORP.) | | | PWRC |
