| 1 | LOC | Locavia 49 | Callsign: Locavia, | F | AVCODES |
| 2 | LOC | Locair Incorporated d/b/a Air Azul | IATA: ZQ, Callsign: Locair, Founded in 2007. Suspended operations on 18 July 2009. | USA | AVCODES |
| 3 | LOC | Missouri Pacific System | eliminated 1/1981 | | NAKINA |
| 4 | LOC | Missouri Pacific Railroad Co. | added 1/1977; 1/1980 | | NAKINA |
| 5 | LOC | Texas and Pacific Railway Co. | 1/1975; eliminated 1/1977 | | NAKINA |
| 6 | LOC | Texas and Pacific Railway Co. | 1/75; eliminated 1/77 | | NRHS |
| 7 | LOC | Missouri Pacific Railroad Co. | added 1/77; 1/80 | | NRHS |
| 8 | LOC | Missouri Pacific System | eliminated 1/81 | | NRHS |
| 9 | LOC | MISSOURI PACIFIC RAILROAD CO. [TEXAS & PACIFIC RWY. CO.] | | | PWRC |
| 10 | LOC | Locomore | City: Locomore GmbH & Co. KG | D | TRAFFIC |
| 11 | LOCA | LITTLE TRANSPORTATION SERVICE LLC | | | SCAC4 |
| 12 | LOCB | LOR-CO BULK TRANSPORT INC | | | SCAC3 |
| 13 | LOCC | LOCAL OIL CO OF ANOKA INC | | | SCAC4 |
| 14 | LOCD | LOCAL DELIVERY SERVICE CO INC | | | SCAC3 |
| 15 | LOCE | LOCO TRANSPORT ENTERPRISES INC | | | SCAC4 |
| 16 | LOCF | LOCATION 2000 TRANSPORTATION INC | | | SCAC4 |
| 17 | LOCG | LOUISVILLE CARTAGE COMPANY INC | | | SCAC3 |
| 18 | LOCH | LOCHNESS SHIPPING INC | | | SCAC3 |
| 19 | LOCH | LOCHNESS SHIPPING INC | | | SCAC4 |
| 20 | LOCI | LOCUST INDUSTRIES INC | | | SCAC3 |
| 21 | LOCI | LOCUST INDUSTRIES LIMITED | | | SCAC4 |
| 22 | LOCK | LOMANS CUSTOM KITCHENS INC | | | SCAC4 |
| 23 | LOCL | LEES ON-CALL DELIVERY SERVICE | | | SCAC3 |
| 24 | LOCM | LEVEL ONE CARRIERS INC | | | SCAC4 |
| 25 | LOCN | LOCATION CIRCUIT INC | | | SCAC3 |
| 26 | LOCO | LOCO INC | | | SCAC4 |
| 27 | LOCON | Logistik & Consulting AG | Berlin | D | privat-bahn.de |
| 28 | LOCON | Locon Logistic & Consulting AG | | D | TRAFFIC |
| 29 | LOCON | LOCON Logistik & Consulting | | DE | VKM |
| 30 | LOCP | LIBERTY OIL COMPANY INC | | | SCAC4 |
| 31 | LOCQ | LOCAL CARRIERS INC | | | SCAC3 |
| 32 | LOCQ | LOPEZ OCHOA, VERONICA MARCELLE | | | SCAC4 |
| 33 | LOCR | LOCKER MOVING & STORAGE, INC | | | SCAC3 |
| 34 | LOCS | LOUISIANA COACHES INC | | | SCAC4 |
| 35 | LOCT | LOWER COLUMBIA TRUCKING INC | | | SCAC3 |
| 36 | LOCU | LOCALLTAINER LOCACOES DE CONTAINERS COM.E.SERV.LTDA | | BR | BIC |
| 37 | LOCV | LOCHINVAR CORPORATION | | | SCAC4 |
| 38 | LOCW | LINDSAY OIL CO | | | SCAC4 |
| 39 | LOCX | L.A. Colo LLC | added 1/2010 | | NAKINA |
| 40 | LOCX | L.A. Colo & Sons Inc. | eliminated 1/2010 | | NAKINA |
| 41 | LOCX | Mobile Locomotive Services, Inc. | 7/2005 (not listed) | | NAKINA |
| 42 | LOCX | American Refrigerator Transit Co. | added 1/1965; 7/1965-1/1975; eliminated 10/1976 | | NAKINA |
| 43 | LOCX | American Refrigerator Transit Co. | added 1/65; 7/65-1/75 | | NRHS |
| 44 | LOCX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 45 | LOCX | +MOBILE LOCOMOTIVE SERVICES, INC. | | | PWRC |
| 46 | LOCX | MOBILE LOCOMOTIVE SERVICES, INC. | | | PWRC |
| 47 | LOCX | Mobile Locomotive Services Inc. | | | RSRV |
| 48 | LOCX | L A COLO LLC | | | SCAC4 |
| 49 | LOCY | LOCOMOTE SYSTEMS INC | | | SCAC4 |
