| 5801 | LONA | LONA TRUCKING CO | | | SCAC3 |
| 5802 | LONB | LAKE ONTARIO BULK CARRIERS, INC. | | | SCAC3 |
| 5803 | LONB | London Buslines | | GB | TRAFFIC |
| 5804 | LONC | LONESTAR CEMENT | | | PWRC |
| 5805 | LONC | London Country | | GB | TRAFFIC |
| 5806 | LOND | LONDON EXPRESS | | | SCAC4 |
| 5807 | LONE | LONE OAK INC | | | SCAC3 |
| 5808 | LONE | LOAD ONE | | | SCAC4 |
| 5809 | LONG | LONG TRANSPORTATION CO | | | PWRC |
| 5810 | LONK | LONG, JACK | | | SCAC3 |
| 5811 | LONQ | LONERGAN TRANSPORTATION INC | | | SCAC3 |
| 5812 | LONR | LONG ROCK CO | | | SCAC3 |
| 5813 | LONS | LONE STAR INTERMODAL INC | | | SCAC3 |
| 5814 | LONSR | London Street Railway | | CDN | TRAFFIC |
| 5815 | LONTR | London Transit | | CDN | TRAFFIC |
| 5816 | LONU | ARXADA AG | | CH | BIC |
| 5817 | LONU | LONZA LTD | | | SCAC4 |
| 5818 | LONV | LONSBERRY, VERN | | | SCAC4 |
| 5819 | LONZA | Lonza AG | | CH | VKM |
| 5820 | LOOC | LONG OIL COMPANY | | | SCAC3 |
| 5821 | LOOC | LORDEN OIL CO INC | | | SCAC4 |
| 5822 | LOOJ | LOONEY, JIM TRUCKING | | | SCAC3 |
| 5823 | LOOM | LOOMIS, JOHN R | | | SCAC3 |
| 5824 | LOOM | LOOMIS, JOHN R INC | | | SCAC4 |
| 5825 | LOON | LOON AIR CARGO LTD | | | SCAC3 |
| 5826 | LOOO | LOUISVILLE PUBLIC WAREHOUSE CO | | | SCAC3 |
| 5827 | LOOP | LOOP PAPER RECYCLING INC | | | SCAC4 |
| 5828 | LOOR | LOOPER, JEARL D TRUCKING | | | SCAC3 |
| 5829 | LOORI | Loori Bus Company | | US-NJ | TRAFFIC |
| 5830 | LOOS | LOOMIS AND SONS | | | SCAC3 |
| 5831 | LOOT | LOOMIS TRANSPORTATION | | | SCAC3 |
| 5832 | LOP | Linton-On-Ouse FTU | Callsign: Linton on Ouse, | GB | AVCODES |
| 5833 | LOP | Linton-on-Ouse Flying Training Unit | | | ICAO1 |
| 5834 | LOPA | LOPEZ AUTO FREIGHT | | | SCAC3 |
| 5835 | LOPB | LOMAX PIGGYBACK, INC | | | SCAC3 |
| 5836 | LOPG | LOPES, G CONSTRUCTION INC | | | SCAC4 |
| 5837 | LOPK | LOEPKER TRUCKING COMPANY | | | SCAC3 |
| 5838 | LOPM | LOPEZ, MIGUEL | | | SCAC3 |
| 5839 | LOPO | LOGISTICS & TRANSPORTATION SERVICES | | | SCAC4 |
| 5840 | LOPP | L O P TRANSPORT | | | SCAC3 |
| 5841 | LOPP | LOPEZ PANDO, ADOLFO | | | SCAC4 |
| 5842 | LOPS | LOPES TRUCKING SERVICE INC | | | SCAC3 |
| 5843 | LOPS | LOPES TRUCKING SERVICE INC | | | SCAC4 |
| 5844 | LOPT | LOPEZ TRUCKING, INC | | | SCAC3 |
| 5845 | LOQC | LOCKE TRANSPORTATION INC | | | SCAC4 |
| 5846 | LOR | Leo-Air CC | Callsign: Leo Charter, | ZA | AVCODES |
| 5847 | LOR | Leo-Air | | | ICAO1 |
| 5848 | LORB | LOROM, BILLY TRUCKING | | | SCAC4 |
| 5849 | LORC | LORDCO TRUCKING INC | | | SCAC3 |
| 5850 | LORD | LORD, BILL TRUCKING INC | | | SCAC4 |
| 5851 | LORE | LORENTZEN, ERIC | | | SCAC3 |
| 5852 | LORI | LORI'S TRUCKING | | | SCAC4 |
| 5853 | LORM | LORD MOVING & STORAGE | | | SCAC3 |
| 5854 | LORN | LORENZ, CHARLES AND SON | | | SCAC3 |
| 5855 | LORN | LORAIN SHIPPING S A - | | | SCAC4 |
| 5856 | LORO | LOSS-ROSE MOVING SYSTEMS | | | SCAC3 |
| 5857 | LORO | LOROM, BARRY TRUCKING | | | SCAC4 |
| 5858 | LORP | Orpington Buses Ltd | | GB | TRAFFIC |
| 5859 | LORR | LORRAINE HORSE TRANS | | | SCAC3 |
| 5860 | LORRY | Lorry-Rail s.a. | | LU | VKM |
| 5861 | LORS | LORSBACH TRUCKING, INC | | | SCAC3 |
| 5862 | LORT | LESTER OIL CO | | | SCAC4 |
| 5863 | LORU | RENZLOR SECURITIES CORP. | | | PWRC |
| 5864 | LORU | Renzlor Securities Corporation | | | RSRV |
| 5865 | LORW | LOREE, WARREN TRANSPORT LTD | | | SCAC3 |
| 5866 | LORW | LONG, R W ENTERPRISES INC | | | SCAC4 |
| 5867 | LORX | Louisiana Oil Refining Corp. | 8/1920-7/1923 | | NAKINA |
| 5868 | LORX | LOUISIANA OIL REFININGCORP. | | | PWRC |
| 5869 | LORY | LORA | | | SCAC4 |
| 5870 | LOS | Lossiemouth FTU | Callsign: Lossie, | GB | AVCODES |
| 5871 | LOS | Lossiemouth Flying Training Unit | | | ICAO1 |
| 5872 | LOSA | LOS ALAMOS TRANSFER COMPANY | | | SCAC3 |
| 5873 | LOSB | L O S T DOODLEBUG | | | SCAC3 |
| 5874 | LOSD | LOUX & SON DRAYAGE | | | SCAC3 |
| 5875 | LOSE | LOUISVILLE-SHELBYVILLE EXPRESS INC | | | SCAC3 |
| 5876 | LOSG | LEOS TRUCKING | | | SCAC3 |
| 5877 | LOSG | LIBERTY ONE SHIPMANAGEMENT GMBH & C | | | SCAC4 |
| 5878 | LOSH | LEADER OCEAN SHIPPING LINE | | | SCAC3 |
| 5879 | LOSH | LOS HUESOS TRUCKING | | | SCAC4 |
| 5880 | LOSI | LONE STAR TRANSFER & STORAGE INC | | | SCAC3 |
| 5881 | LOSK | LOS GORDOS TRUCKING | | | SCAC4 |
| 5882 | LOSL | LOISELLE TRANSPORTATION | | | SCAC3 |
| 5883 | LOSP | LYBRA OVERSEAS SHIPPING | | | SCAC4 |
| 5884 | LOSR | LOS ROBLES TRUCKING | | | SCAC4 |
| 5885 | LOST | LOISELLE TRANSPORT INC | | | SCAC3 |
| 5886 | LOSTR | LOSTR a.s. | | CZ | VKM |
| 5887 | LOSU | EMERSON CLIMATE TECHNOLOGIES | | DK | BIC |
| 5888 | LOSU | YORK REFRIGERATION MARINE AND CONTR | | | SCAC4 |
| 5889 | LOSV | LOS TRANSFER AND STORAGE | | | SCAC3 |
| 5890 | LOSW | LOS WAGES TRANSPORT LTD | | | SCAC4 |
| 5891 | LOSX | Locomotive Specialist Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 5892 | LOSX | Los Angeles Soap Co. | 7/1930-4/1961; eliminated 10/1963 | | NAKINA |
| 5893 | LOSX | Los Angeles Soap Co. | 4/38-4/61 | | NRHS |
| 5894 | LOSX | Locomotive Specialist Inc. | Jul-00 | | NRHS |
| 5895 | LOSX | *LOS ANGELES SOAP CO. | | | PWRC |
| 5896 | LOSX | *LONE STAR RAILROAD, INC. | | | PWRC |
| 5897 | LOSX | +LOCOMOTIVE SPECIALISTS INC. | | | PWRC |
| 5898 | LOSX | Locomotive Specialists | | | RSRV |
| 5899 | LOT | Polskie Linie Lotnocze (LOT) | IATA: LO, Callsign: Pollot, IATA Prefix: 080, | PL | AVCODES |
| 5900 | LOT | LOT Polish Airlines | IATA: LO | | ICAO1 |
