| 1 | LA | Linea Aerea Nacional-Chile S.A. Lan-Chile | ICAO: LAN, Callsign: LAN, IATA Prefix: 045, Name changed to LAN Airlines, S.A. | RCH | AVCODES |
| 2 | LA | LAN Airlines, S.A. | ICAO: LAN, Callsign: LAN, IATA Prefix: 045, Name changed to LATAM Airlines Group S.A. d/b/a LAN Airlines. Name changed from Linea Aerea Nacional-Chile S.A. Lan-Chile | RCH | AVCODES |
| 3 | LA | LATAM Airlines Chile | ICAO: LAN, Callsign: LAN, IATA Prefix: 045, Name changed from LAN Airlines, S.A. w.e.f. 05 May 2016. Name changed from LAN Airlines, S.A. previously from Linea Aerea Nacional-Chile S.A. Lan-Chile. | RCH | AVCODES |
| 4 | LA | The Kansas City Southern Ry. Co. | eliminated 1/1989; 1/1994-7/2005 | | NAKINA |
| 5 | LA | Louisana & Arkansas Ry. | 1/1975-1/1980 | | NAKINA |
| 6 | LA | Louisana & Arkansas Ry. | 1/75-1/80 | | NRHS |
| 7 | LA | The Kansas City Southern Ry. Co. | eliminated 1/89; 1/94-7/2000 | | NRHS |
| 8 | LA | KANSAS CITY SOUTHERN RAILWAY COMPANY [LOUISIANA & ARKANSAS RY] | | | PWRC |
| 9 | LA | Louisiana and Arkansas Railway (Kansas City Southern Railway) | | | RSRV |
| 10 | LA | LOUISIANA & ARKANSAS RAILWAY COMPAN | | | SCAC4 |
| 11 | LA | | | USA | TRAFFIC |
| 12 | LA&S | Lorain, Ashton & Southern R.R. | 8/1920-7/1923 | | NAKINA |
| 13 | LA&S | LORAIN, ASHTON & SOUTHERN RAILROAD | | | PWRC |
| 14 | LAA | Jamahirya Libyan Arab Airlines | IATA: LN, Callsign: Libair, Name changed to Libyan Airlines | LAR | AVCODES |
| 15 | LAA | Libyan Airlines | IATA: LN, Callsign: Libair, Name changed from Jamahirya Libyan Arab Airlines | LAR | AVCODES |
| 16 | LAA | Libyan Arab Airlines | IATA: LN | | ICAO1 |
| 17 | LAAAB | Lundstams Åkeri & Åkeri & Återvinning AB | | SE | VKM |
| 18 | LAAC | LAMB, ARTHUR C COMPANY | | | SCAC3 |
| 19 | LAAD | LAND-AIR DELIVERY INC | | | SCAC3 |
| 20 | LAAF | LONG AGO & FAR AWAY | | | SCAC4 |
| 21 | LAAJ | LACHMAR | | | SCAC3 |
| 22 | LAAM | L&L MOTOR FREIGHT, INC | | | SCAC3 |
| 23 | LAAM | LA CASA GRANDE | | | SCAC4 |
| 24 | LAAN | LAMARTIS INC | | | SCAC4 |
| 25 | LAAO | LATIN AMERICAS TRAVEL & TOURS | | | SCAC3 |
| 26 | LAAP | LOUISIANA ARMY AMMO PLANT | | | PWRC |
| 27 | LAAP | LATIN AMERICAN SHIPPING | | | SCAC3 |
| 28 | LAAP | LAMONTAGNE, JINNY | | | SCAC4 |
| 29 | LAAQ | LOS ANGELES AIR TRUCKING SERVICE | | | SCAC3 |
| 30 | LAAR | LAWHORN AUTO WRECKING | | | SCAC3 |
| 31 | LAAS | LOERA ACOSTA, MANUEL HORACIO | | | SCAC4 |
| 32 | LAAV | LANASA, V F INC | | | SCAC3 |
| 33 | LAAV | LANASA, V F INC | | | SCAC4 |
| 34 | LAB | L.A.B. Flying Service, Inc. | IATA: JF, Callsign: LAB, IATA Prefix: 510, Founded in 1956. Ceased operations in 2008. Designator JF reinstated by IATA | USA | AVCODES |
| 35 | LAB | L.A.B. Flying Service | IATA: JF | | ICAO1 |
| 36 | LAB | Lloyd Aereo Boliviano | Real: LLB | BOL | TRAFFIC |
| 37 | LAB | LAFARGE AGREGATE BETOANE SA | | RO | VKM |
| 38 | LABA | LABATTE FARMS | | | SCAC4 |
| 39 | LABATT | Labatt Brewery | | USA | TRAFFIC |
| 40 | LABB | LABOUBE W A INC | | | SCAC3 |
| 41 | LABC | LABONTE, CATHE | | | SCAC4 |
| 42 | LABD | LABONTE TRANSIT INC | | | SCAC4 |
| 43 | LABE | LABERGE & FILS LTEE (TRANSPORT DIV) | | | SCAC3 |
| 44 | LABE | LABRADOR EXPRESS LLC | | | SCAC4 |
| 45 | LABG | LABELLE STORAGE & MOVING CO | | | SCAC3 |
| 46 | LABG | LANDIS, D L INC | | | SCAC4 |
| 47 | LABH | LABRANCHE, RUDOLPH INC | | | SCAC3 |
| 48 | LABH | LATTO, ART WILDERNESS CABINS | | | SCAC4 |
| 49 | LABI | LE BRANE CARTAGE CO INC | | | SCAC3 |
| 50 | LABJ | LA BAGH, GEORGE A INC | | | SCAC3 |
| 51 | LABM | LABUMBARD, ERNEST | | | SCAC3 |
| 52 | LABN | LAWRENCE BURNS | | | SCAC3 |
| 53 | LABO | LA BELLE TRF & STG CO | | | SCAC3 |
| 54 | LABO | LASHLEY LUMBER INC | | | SCAC4 |
| 55 | LABP | LA BUDA TRUCKING INC | | | SCAC3 |
| 56 | LABR | LAMBERT TRANSFER CO (A MINNESOTA CO | | | SCAC3 |
| 57 | LABR | LAMBERT TRANSFER CO (A MINNESOTA CO | | | SCAC4 |
| 58 | LABS | LA BARGE TRUCKING CO INC | | | SCAC3 |
| 59 | LABU | LAGERMAX AUTOTRANSPORT GMBH | | A | BIC |
| 60 | LABV | LABORATORY ANIMAL BREEDERS & SERVIC | | | SCAC3 |
| 61 | LABV | LAKESIDE HAULING INC | | | SCAC4 |
| 62 | LABW | LAWS BONDED WAREHOUSE OF JACKSONVIL | | | SCAC3 |
| 63 | LABW | LAKE CITY LOGISTICS | | | SCAC4 |
| 64 | LABX | LABRADOR IRON MINES LIMITED | | | SCAC4 |
| 65 | LABY | LAMESA BUTANE COMPANY | | | SCAC4 |
| 66 | LAC | Lockheed Aircraft Corp. | Callsign: Lockheed, | USA | AVCODES |
| 67 | LAC | Lockeed Aircraft Corporation | | | ICAO1 |
| 68 | LAC | London & Country | The Drawlane Group bought LCSW in February 1998, and became British Bus in December 1992. LCSW was rebranded as London & Country in 1993, | GB | TRAFFIC |
| 69 | LACB | LOWDERMAN AUCTION COMPANY | | | SCAC4 |
| 70 | LACD | LACKEY, CLIFFORD V | | | SCAC3 |
| 71 | LACE | LACE TRUCKING INC | | | SCAC3 |
| 72 | LACF | L A C E TRANSPORTATION LLC | | | SCAC4 |
| 73 | LACG | L A C TRUCKING CO | | | SCAC3 |
| 74 | LACG | LARGE CARTAGE INC | | | SCAC4 |
| 75 | LACH | LE ROUX & CARSON TRUCKING | | | SCAC3 |
| 76 | LACH | LACHO TRANSPORTES | | | SCAC4 |
| 77 | LACI | LAWRENCE, J C TRUCKING INC | | | SCAC3 |
| 78 | LACJ | LANCER (DIV OF JONS) | | | SCAC3 |
| 79 | LACK | LACKAS, KEITH | | | SCAC3 |
| 80 | LACL | LANCASTER, A CLYDE | | | SCAC3 |
| 81 | LACL | LES ANTIQUITES CLEMENT INC | | | SCAC4 |
| 82 | LACM | LAS CRUCES MOVING & STORAGE INC | | | SCAC3 |
| 83 | LACM | LAS CRUCES MOVING & STORAGE INC | | | SCAC4 |
| 84 | LACMTA | Los Angeles County Metro Transit Authority | | USA | TRAFFIC |
| 85 | LACN | LAVOIE, R TRUCKING INC | | | SCAC3 |
| 86 | LACN | LA CORPORATION DACIER ALLIANCE | | | SCAC4 |
| 87 | LACP | LA CHAPELLE RAY & SONS INC | | | SCAC3 |
| 88 | LACQ | LAKE CITY TRUCK LINE | | | SCAC3 |
| 89 | LACR | LACO SERVICE INC | | | SCAC4 |
| 90 | LACS | LARI CONSTRUCTION | | | SCAC4 |
| 91 | LACT | LOS ANGELES COUNTY TRANSPORTATION COMMISSION | | | PWRC |
| 92 | LACT | LACOMBE TRUCKING INC | | | SCAC4 |
| 93 | LACU | LASSEN & COMPANY | | | SCAC3 |
| 94 | LACU | LASSEN & COMPANY | | | SCAC4 |
| 95 | LACV | LACOSTA VAN & STORAGE | | | SCAC3 |
| 96 | LACW | LACOUR WAREHOUSING INC | | | SCAC3 |
| 97 | LACW | LA BODEGA DE MEXICO INC | | | SCAC4 |
| 98 | LACX | Goodyear Tire & Rubber Co. | added 10/1977; 1/1980; eliminated 1/1994; 1/1994 (not listed); added 4/1997; 7/2000; eliminated 4/2001; 7/2005 (not listed) | | NAKINA |
| 99 | LACX | Leaseway System Corp. | added 7/1966; 10/1966-1/1975; eliminated 10/1977 | | NAKINA |
| 100 | LACX | Leaseway System Corp. | added 7/66; 10/66-1/75 | | NRHS |
