| 1 | LO | Polskie Linie Lotnocze (LOT) | ICAO: LOT, Callsign: Pollot, IATA Prefix: 080, | PL | AVCODES |
| 2 | LO | Métro Lausanne-Ouchy SA | | CH | VKM |
| 3 | LOA | Sukhumi Airways | Callsign: Loreksi, | GE | AVCODES |
| 4 | LOA | Lonestar Airways | Callsign: Loneair, | LB | AVCODES |
| 5 | LOA | Missouri Pacific System | eliminated 1/1981 | | NAKINA |
| 6 | LOA | Missouri Pacific Railroad Co. | added 1/1977; 1/1980 | | NAKINA |
| 7 | LOA | Texas and Pacific Railway Co. | 1/1975; eliminated 1/1977 | | NAKINA |
| 8 | LOA | Texas and Pacific Railway Co. | 1/75; eliminated 1/77 | | NRHS |
| 9 | LOA | Missouri Pacific Railroad Co. | added 1/77; 1/80 | | NRHS |
| 10 | LOA | Missouri Pacific System | eliminated 1/81 | | NRHS |
| 11 | LOA | MISSOURI PACIFIC RAILROAD CO. [TEXAS & PACIFIC RWY. CO.] | | | PWRC |
| 12 | LOAC | LOOMIS ARMORED CAR SERVICE LTD | | | SCAC3 |
| 13 | LOAC | LONDON STAIRCASE INC | | | SCAC4 |
| 14 | LOAD | LOAD MASTERS | | | SCAC3 |
| 15 | LOAD | LOAD MASTERS | | | SCAC4 |
| 16 | LOAE | LOADSTAR INC | | | SCAC4 |
| 17 | LOAG | LOTT, ARLO G TRUCKING INC | | | SCAC3 |
| 18 | LOAG | LOTT, ARLO G TRUCKING INC | | | SCAC4 |
| 19 | LOAI | LOAD-IT | | | SCAC3 |
| 20 | LOAJ | LOOMIS ARMORED CAR SERVICE INC | | | SCAC3 |
| 21 | LOAM | Louisiana Midland Ry. Co. | added 7/1974; 1/1975-1/1980; eliminated 1/1987 | | NAKINA |
| 22 | LOAM | Louisiana Midland Ry. Co. | added 7/74; 1/75-1/80; eliminated 1/87 | | NRHS |
| 23 | LOAM | LOUISIANA MIDLAND RAILWAY CO. | | | PWRC |
| 24 | LOAM | Louisiana Midland Railway | | | RSRV |
| 25 | LOAM | Louisiana Midland Ry. Co. | | USA | TRAFFIC |
| 26 | LOAN | LOERA ARCEO, JR ROLANDO NOEL | | | SCAC4 |
| 27 | LOAO | LOCKPORT CHEMICAL COMPANY INC | | | SCAC3 |
| 28 | LOAQ | LOURASH CONSTRUCTION INC | | | SCAC3 |
| 29 | LOAS | LOS ANGELES SEATTLE LTL EXPRESS | | | SCAC3 |
| 30 | LOAS | LOPEZ JAQUEZ, JULIAN | | | SCAC4 |
| 31 | LOAT | LOA TRANSPORT | | | SCAC4 |
| 32 | LOAX | American Refrigerator Transit Co. | added 4/1963; 7/1965-1/1975; eliminated 10/1976 | | NAKINA |
| 33 | LOAX | American Refrigerator Transit Co. | 7/65-1/75 | | NRHS |
| 34 | LOAX | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 35 | LOBC | LOGISTICS OF BAJA CALIFORNIA | | | SCAC4 |
| 36 | LOBD | LOWBED, BRIAN CECIL | | | SCAC3 |
| 37 | LOBI | LOMBARDO BROS CARTAGE COMPANY | | | SCAC3 |
| 38 | LOBK | LO-BO TRUCKING INC | | | SCAC3 |
| 39 | LOBK | LOGISTICS ONE BROKERAGE INC | | | SCAC4 |
| 40 | LOBL | LOBLOWS LTD | | | SCAC3 |
| 41 | LOBR | LOCKWOOD BROTHERS INC | | | SCAC3 |
| 42 | LOBS | LOBOSCO, MICHAEL | | | SCAC3 |
| 43 | LOBS | LOBSTERS ALIVE LIMITED | | | SCAC4 |
| 44 | LOBT | LOUNSBURY TRUCKING | | | SCAC3 |
| 45 | LOBW | LOBLAW | | | SCAC4 |
| 46 | LOC | Locavia 49 | Callsign: Locavia, | F | AVCODES |
| 47 | LOC | Locair Incorporated d/b/a Air Azul | IATA: ZQ, Callsign: Locair, Founded in 2007. Suspended operations on 18 July 2009. | USA | AVCODES |
| 48 | LOC | Missouri Pacific System | eliminated 1/1981 | | NAKINA |
| 49 | LOC | Missouri Pacific Railroad Co. | added 1/1977; 1/1980 | | NAKINA |
| 50 | LOC | Texas and Pacific Railway Co. | 1/1975; eliminated 1/1977 | | NAKINA |
| 51 | LOC | Texas and Pacific Railway Co. | 1/75; eliminated 1/77 | | NRHS |
| 52 | LOC | Missouri Pacific Railroad Co. | added 1/77; 1/80 | | NRHS |
| 53 | LOC | Missouri Pacific System | eliminated 1/81 | | NRHS |
| 54 | LOC | MISSOURI PACIFIC RAILROAD CO. [TEXAS & PACIFIC RWY. CO.] | | | PWRC |
| 55 | LOC | Locomore | City: Locomore GmbH & Co. KG | D | TRAFFIC |
| 56 | LOCA | LITTLE TRANSPORTATION SERVICE LLC | | | SCAC4 |
| 57 | LOCB | LOR-CO BULK TRANSPORT INC | | | SCAC3 |
| 58 | LOCC | LOCAL OIL CO OF ANOKA INC | | | SCAC4 |
| 59 | LOCD | LOCAL DELIVERY SERVICE CO INC | | | SCAC3 |
| 60 | LOCE | LOCO TRANSPORT ENTERPRISES INC | | | SCAC4 |
| 61 | LOCF | LOCATION 2000 TRANSPORTATION INC | | | SCAC4 |
| 62 | LOCG | LOUISVILLE CARTAGE COMPANY INC | | | SCAC3 |
| 63 | LOCH | LOCHNESS SHIPPING INC | | | SCAC3 |
| 64 | LOCH | LOCHNESS SHIPPING INC | | | SCAC4 |
| 65 | LOCI | LOCUST INDUSTRIES INC | | | SCAC3 |
| 66 | LOCI | LOCUST INDUSTRIES LIMITED | | | SCAC4 |
| 67 | LOCK | LOMANS CUSTOM KITCHENS INC | | | SCAC4 |
| 68 | LOCL | LEES ON-CALL DELIVERY SERVICE | | | SCAC3 |
| 69 | LOCM | LEVEL ONE CARRIERS INC | | | SCAC4 |
| 70 | LOCN | LOCATION CIRCUIT INC | | | SCAC3 |
| 71 | LOCO | LOCO INC | | | SCAC4 |
| 72 | LOCON | Logistik & Consulting AG | Berlin | D | privat-bahn.de |
| 73 | LOCON | Locon Logistic & Consulting AG | | D | TRAFFIC |
| 74 | LOCON | LOCON Logistik & Consulting | | DE | VKM |
| 75 | LOCP | LIBERTY OIL COMPANY INC | | | SCAC4 |
| 76 | LOCQ | LOCAL CARRIERS INC | | | SCAC3 |
| 77 | LOCQ | LOPEZ OCHOA, VERONICA MARCELLE | | | SCAC4 |
| 78 | LOCR | LOCKER MOVING & STORAGE, INC | | | SCAC3 |
| 79 | LOCS | LOUISIANA COACHES INC | | | SCAC4 |
| 80 | LOCT | LOWER COLUMBIA TRUCKING INC | | | SCAC3 |
| 81 | LOCU | LOCALLTAINER LOCACOES DE CONTAINERS COM.E.SERV.LTDA | | BR | BIC |
| 82 | LOCV | LOCHINVAR CORPORATION | | | SCAC4 |
| 83 | LOCW | LINDSAY OIL CO | | | SCAC4 |
| 84 | LOCX | L.A. Colo LLC | added 1/2010 | | NAKINA |
| 85 | LOCX | L.A. Colo & Sons Inc. | eliminated 1/2010 | | NAKINA |
| 86 | LOCX | Mobile Locomotive Services, Inc. | 7/2005 (not listed) | | NAKINA |
| 87 | LOCX | American Refrigerator Transit Co. | added 1/1965; 7/1965-1/1975; eliminated 10/1976 | | NAKINA |
| 88 | LOCX | American Refrigerator Transit Co. | added 1/65; 7/65-1/75 | | NRHS |
| 89 | LOCX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 90 | LOCX | +MOBILE LOCOMOTIVE SERVICES, INC. | | | PWRC |
| 91 | LOCX | MOBILE LOCOMOTIVE SERVICES, INC. | | | PWRC |
| 92 | LOCX | Mobile Locomotive Services Inc. | | | RSRV |
| 93 | LOCX | L A COLO LLC | | | SCAC4 |
| 94 | LOCY | LOCOMOTE SYSTEMS INC | | | SCAC4 |
| 95 | LOD | Malmoe Air Taxi AB | Callsign: Logic, | S | AVCODES |
| 96 | LOD | Malmoe Air Taxi | | | ICAO1 |
| 97 | LODB | LOCAL DISTRIBUTION INC | | | SCAC3 |
| 98 | LODC | LODISCO INC | | | SCAC4 |
| 99 | LODE | LODEL INTERNATIONAL | | | SCAC4 |
| 100 | LODI | LOHNES, DANIEL TRUCKING CO INC | | | SCAC3 |
