| 5701 | LOGU | EUROTAINER SAS | | | SCAC4 |
| 5702 | LOGV | LOGISTICS SERVICES INC | | | SCAC4 |
| 5703 | LOGX | Linden Leasing, Inc. | added 1/1997; 7/2000-7/2005; eliminated 7/2006 | | NAKINA |
| 5704 | LOGX | Linden Leasing, Inc. | added 1/97; 7/2000 | | NRHS |
| 5705 | LOGX | LINDEN LEASING INC. | | | PWRC |
| 5706 | LOGX | Linden Leasing | | | RSRV |
| 5707 | LOGX | LINDEN LEASING INC | | | SCAC4 |
| 5708 | LOHB | LOCHER BROTHERS INC | | | SCAC3 |
| 5709 | LOHC | LOCUST HARDWARE CO INC | | | SCAC3 |
| 5710 | LOHD | LOHR DISTRIBUTING CO INC | | | SCAC3 |
| 5711 | LOHE | LONG HAUL EXPRESS INC | | | SCAC3 |
| 5712 | LOHN | LOTHLORIEN | | | SCAC3 |
| 5713 | LOHS | LOHSE TRANSFER | | | SCAC3 |
| 5714 | LOIA | LITTLE OTTS INC | | | SCAC4 |
| 5715 | LOIC | LANK OIL COMPANY | | | SCAC3 |
| 5716 | LOIC | LANK OIL COMPANY | | | SCAC4 |
| 5717 | LOID | LOGISTICA INTEGRAL DAHN SA DE CV | | | SCAC4 |
| 5718 | LOIE | LONG ISLAND FURNITURE EXPRESS INC | | | SCAC3 |
| 5719 | LOIF | LONG ISLAND FLEET LEASE | | | SCAC3 |
| 5720 | LOIG | LONG ISLAND GRAIN CO INC | | | SCAC3 |
| 5721 | LOII | LUND OIL INC | | | SCAC4 |
| 5722 | LOIL | LOCAL OIL CO INC | | | SCAC3 |
| 5723 | LOIL | LOCAL OIL CO INC | | | SCAC4 |
| 5724 | LOIM | LEMLER OIL INC | | | SCAC4 |
| 5725 | LOIO | LONG MOVING AND STORAGE | | | SCAC3 |
| 5726 | LOIP | LANCASTER OIL CO OF PINELLAS INC | | | SCAC4 |
| 5727 | LOJ | Lojy Air | | ET | AVCODES |
| 5728 | LOJF | LOMMA, J F INC | | | SCAC3 |
| 5729 | LOJF | LOMMA, J F INC | | | SCAC4 |
| 5730 | LOJL | LOKUTA, J L JR INC | | | SCAC3 |
| 5731 | LOJO | LONG, S N WAREHOUSE | | | SCAC3 |
| 5732 | LOJO | LOJO SPECIALIZED HAULING | | | SCAC4 |
| 5733 | LOJS | LORD, JAMES & SONS | | | SCAC3 |
| 5734 | LOJT | LOGAN, JIM TRUCKING INC | | | SCAC3 |
| 5735 | LOJT | LES OPERATIONS JTC (RICHELIEU) NO 2 | | | SCAC4 |
| 5736 | LOJX | American Refrigerator Transit Co. | added 4/1965; 7/1965 (not listed); eliminated 7/1965 | | NAKINA |
| 5737 | LOJX | American Refrigerator Transit Co. | added 4/65; 7/65; eliminated 7/65 | | NRHS |
| 5738 | LOJX | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 5739 | LOK | Alok Air Co. | Callsign: Alok Air, | SUD | AVCODES |
| 5740 | LOK | Alok Air | | | ICAO1 |
| 5741 | LOKA | LOKUTA, E J INC | | | SCAC3 |
| 5742 | LOKA | LOKUTA, E J INC | | | SCAC4 |
| 5743 | LOKB | LOOKINGBILL TRANSIT INC | | | SCAC3 |
| 5744 | LOKC | LOK TRUCKING COMPANY | | | SCAC3 |
| 5745 | LOKE | LOCKE TRANSPORTATION INC | | | SCAC4 |
| 5746 | LOKI | LOCK CITY TRUCKING, INC | | | SCAC3 |
| 5747 | LOKN | LANCO TRUCKING INC | | | SCAC4 |
| 5748 | LOKO | Lokomotion Gesellschaft für Schienentraktion GmbH | Real: LM | D | TRAFFIC |
| 5749 | LOKO | Loko Trans BG OOD / Локо Транс БГ ООД | | BG | VKM |
| 5750 | LOKOOP | Lookup AG | Die Lokoop AG (LAG) war ein von der Schweizerischen Südostbahn (SOB), der Mittelthurgaubahn (MThB) und dem Reisebüro Mittelthurgau (RMT) gegründetes Unternehmen zur Vermietung von Lokomotiven | CH | TRAFFIC |
| 5751 | LOKP | LOCKPORT TRUCKING COMPANY INC | | | SCAC3 |
| 5752 | LOKP | LO-KEY EXPRESS | | | SCAC4 |
| 5753 | LOKQ | LOGIKOR INC | | | SCAC4 |
| 5754 | LOKR | LOOK, RALPH | | | SCAC3 |
| 5755 | LOKS | LARSONS OF KANSAS INC | | | SCAC4 |
| 5756 | LOKSK | LOK RAIL s.r.o. | | SK | VKM |
| 5757 | LOKT | LOCKHART TRUCKING | | | SCAC3 |
| 5758 | LOKW | LOWARY, KIM W | | | SCAC3 |
| 5759 | LOL | L.O.S. Ltd. | Callsign: Lola, | SK | AVCODES |
| 5760 | LOL | Easycharter LLC | IATA: RD, Callsign: Easy Charter, IATA Prefix: 311, | GE | AVCODES |
| 5761 | LOLA | LAWSON OIL CO | | | SCAC4 |
| 5762 | LOLC | LEGACY OFFSHORE LLC | | | SCAC4 |
| 5763 | LOLE | LEON LEASING COMPANY | | | SCAC3 |
| 5764 | LOLI | LOCAL TRUCK LINES, INC | | | SCAC3 |
| 5765 | LOLI | LOCAL TRUCK LINES INC | | | SCAC4 |
| 5766 | LOLM | LOVE LIMOUSINE | | | SCAC4 |
| 5767 | LOLN | LORENCE LINES INC | | | SCAC3 |
| 5768 | LOLO | LAND O LAKES OIL COMPANY INC | | | SCAC4 |
| 5769 | LOLQ | L & L TRANSFER & STORAGE | | | SCAC3 |
| 5770 | LOLQ | L & L TRANSFER & STORAGE | | | SCAC4 |
| 5771 | LOLW | LOTH LUMBER CO INC | | | SCAC3 |
| 5772 | LOLX | Local Corp. | added 10/1969; 4/1970-1/1975; eliminated 4/1976 | | NAKINA |
| 5773 | LOLX | Local Corp. | added 10/69; 4/70-1/75; eliminated 4/76 | | NRHS |
| 5774 | LOLX | LOCAL CORP. | | | PWRC |
| 5775 | LOM | Sertel (Servicios Telereservacios, S.A. de C.V.) | | MEX | AVCODES |
| 5776 | LOMA | LOMAX TRUCKING SERVICE INC | | | SCAC3 |
| 5777 | LOMB | LOMBARD BROS INC | | | PWRC |
| 5778 | LOMC | LOMBARDO, CHARLES | | | SCAC3 |
| 5779 | LOMH | LOTT MOBILE HOME MOVERS | | | SCAC3 |
| 5780 | LOMI | LOOMIX INC | | | SCAC3 |
| 5781 | LOMI | London Midland | | UK | VKM |
| 5782 | LOMJ | LONG, M & J TRUCKING | | | SCAC3 |
| 5783 | LOML | LOTT MOTOR LINES INC | | | SCAC3 |
| 5784 | LOMN | LOMEN AUTO TRANSPORT | | | SCAC3 |
| 5785 | LOMN | LOMEN AUTO TRANSPORT INC | | | SCAC4 |
| 5786 | LOMO | LOMBARDO MOTOR SERVICE INC | | | SCAC3 |
| 5787 | LOMP | LOMPOC VAN & STORAGE INC | | | SCAC3 |
| 5788 | LOMP | LOMPOC MOVING SYSTEMS | | | SCAC4 |
| 5789 | LOMS | LOOMS TRANSFER INC | | | SCAC4 |
| 5790 | LOMT | LOMA TRANSPORT & LEASING | | | SCAC3 |
| 5791 | LOMT | LORBEC METALS USA LTD | | | SCAC4 |
| 5792 | LOMU | LEVORATO MARCEVAGGI SRL | | I | BIC |
| 5793 | LOMU | LOMMERTS, DELFZIJL | | | SCAC3 |
| 5794 | LOMU | LEVORATO MARCEVAGGI SRL | | | SCAC4 |
| 5795 | LOMW | LOOMIS, WILBER W TRUCKING | | | SCAC3 |
| 5796 | LOMZA | Miejskie Przedsiębiorstwo Komunikacyjne w Łomży | | PL | TRAFFIC |
| 5797 | LON | Avilond Airline | Callsign: Avilond, Ceased operations. | UA | AVCODES |
| 5798 | LON | London European Airways PLC | IATA: UQ, Callsign: European, Name changed to Ryanair Europe. | GB | AVCODES |
| 5799 | LON | Ryanair Eurpoe | IATA: UQ, Callsign: European, Merged into Ryanair Ireland. Name changed from London European Airways PLC. | GB | AVCODES |
| 5800 | LON | Legend of the Nile Aviation | Callsign: Misr, | ET | AVCODES |
