| 3701 | LINC | LEWIS & CLARK RAILWAY CO. | | | PWRC |
| 3702 | LINC | Lewis and Clark Railway | | | RSRV |
| 3703 | LINC | LEWIS & CLARK RAILWAY CO | | | SCAC3 |
| 3704 | LINC | LEWIS & CLARK RAILWAY CO | | | SCAC4 |
| 3705 | LINCT | Lincoln Transit | | US-NJ | TRAFFIC |
| 3706 | LINDE | LINDE TECHNOPLYN a.s. | | CZ | VKM |
| 3707 | LINE | LINE & LINE OIL CO | | | SCAC4 |
| 3708 | LINE | Line CNM AB | | SE | VKM |
| 3709 | LINEAS | Lineas Group SA/NV | Real: LNS | B | TRAFFIC |
| 3710 | LING | LINDEN ASSOCIATED GROWERS INC | | | SCAC3 |
| 3711 | LING | LINDE | | | SCAC4 |
| 3712 | LING | Aer Lingus Teoranta -> Aer Linus Limited | Real: EI | IRL | TRAFFIC |
| 3713 | LINH | LIGHTNING FREIGHT INC | | | SCAC4 |
| 3714 | LINH | Lindenhurst Bus Company | | USA | TRAFFIC |
| 3715 | LINI | LINDEN INDUSTRIAL SERVICE INC | | | SCAC3 |
| 3716 | LINI | LINDHAM INDUSTRIES LTD | | | SCAC4 |
| 3717 | LINJ | LINK, JACK TRUCK LINE, INC | | | SCAC3 |
| 3718 | LINJ | LINK, JACK TRUCK LINE INC | | | SCAC4 |
| 3719 | LINK | LINK TRUCKING, INC | | | SCAC3 |
| 3720 | LINK | LINK TRUCKING, INC | | | SCAC4 |
| 3721 | LINKKR | Link-Bus Kraków | | PL | TRAFFIC |
| 3722 | LINL | LINCOLN TRANSPORTATION SERVICES INC | | | SCAC4 |
| 3723 | LINN | LINN, JAMES IMPLEMENT | | | SCAC3 |
| 3724 | LINN | LINN COOPERATIVE OIL CO | | | SCAC4 |
| 3725 | LINO | LIVINGSTON, C E UNION BUS TERMINAL | | | SCAC3 |
| 3726 | LINO | LINC ONTARIO LTD | | | SCAC4 |
| 3727 | LINP | LINCOLN, L L | | | SCAC3 |
| 3728 | LINP | LES INDUSTRIES HARNOIS INC | | | SCAC4 |
| 3729 | LINQ | LING TRANSFER | | | SCAC3 |
| 3730 | LINQ | LAIMA INC | | | SCAC4 |
| 3731 | LINR | LINARES TRANSPORT CORP | | | SCAC4 |
| 3732 | LINS | LINDSEY'S EXPRESS, INC | | | SCAC3 |
| 3733 | LINT | LINK PETROLEUM SERVICES LTD | | | SCAC4 |
| 3734 | LINU | LINDE GMBH, LINDE GAS DEUTSCHLAND | | D | BIC |
| 3735 | LINU | Linde AG Geschaftsbereich | | | RSRV |
| 3736 | LINU | LINDE GAS PTY. LTD | | | SCAC3 |
| 3737 | LINU | LINDE AG GESCHAFTSBEREICH | | | SCAC4 |
| 3738 | LINV | LINCOLN VAN & STORAGE CO INC | | | SCAC3 |
| 3739 | LINX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 10/1994 | | NAKINA |
| 3740 | LINX | North American Car Corp. | added 4/1966; 10/1966-1/1980; eliminated 1/1984 | | NAKINA |
| 3741 | LINX | North American Car Corp. | added 4/66; 10/66-1/80 | | NRHS |
| 3742 | LINX | General Electric Railcar Services Corp. | 1/94; eliminated 10/94 | | NRHS |
| 3743 | LINX | (NATX) GENERAL ELECTRIC RAILCAR SERVICES CORP. [NORTH AMERICAN CAR CORP.] | | | PWRC |
| 3744 | LINX | GE Railcar Services Corporation | | | RSRV |
| 3745 | LINY | LINDSEY TRUCKING & DISTRIBUTION | | | SCAC3 |
| 3746 | LINY | LINK LOGISTICS | | | SCAC4 |
| 3747 | LINZ | LINGOE ELEVATOR | | | PWRC |
| 3748 | LINZ | | City: Linz | A | TRAFFIC |
| 3749 | LIO | Air Charter Ltd. (Leiguflug Isleifs Ottesen) | | IS | AVCODES |
| 3750 | LIOA | LIOTTA TRUCKING | | | SCAC3 |
| 3751 | LIOA | LIOTTA TRUCKING | | | SCAC4 |
| 3752 | LIOD | LIONUDAKIS, NICK | | | SCAC3 |
| 3753 | LIOE | LIONE EXPRESS INC | | | SCAC3 |
| 3754 | LIOE | LIONE EXPRESS INC | | | SCAC4 |
| 3755 | LIOG | LINDSAY OLIVE GROWERS | | | SCAC3 |
| 3756 | LIOH | LIONHEAD TRANSPORT LTD | | | SCAC3 |
| 3757 | LION | LION MESSENGER SERVICE | | | SCAC3 |
| 3758 | LION | LION LOGISTICS INC | | | SCAC4 |
| 3759 | LIOR | SAD Liorbus | | SK | TRAFFIC |
| 3760 | LIOU | LION FERRY, A.B. GAKNSTAD | | | SCAC3 |
| 3761 | LIOX | Liberty Cotton Oil Co. | 8/1920-7/1923 | | NAKINA |
| 3762 | LIOX | LIBERTY COTTON OIL CO. | | | PWRC |
| 3763 | LIP | State Lipetsk Air Enterprise | Callsign: Lipetsk-Avia, | RUS | AVCODES |
| 3764 | LIP | Lipican Aer d.o.o. | Callsign: Lipizan, | SLO | AVCODES |
| 3765 | LIPD | LIPTAK, DANIEL A INCORPORATED | | | SCAC3 |
| 3766 | LIPI | LECS INTERPRISES INC | | | SCAC4 |
| 3767 | LIPO | LIPO CHEMICALS INC | | | SCAC3 |
| 3768 | LIPO | LETOURNEAU PIPE ORGANS LTD | | | SCAC4 |
| 3769 | LIPP | LIPPINCOTT VAN LINES | | | SCAC4 |
| 3770 | LIPR | LIPARI TRUCKING CO | | | SCAC3 |
| 3771 | LIPS | LIPPS, JERRY, INC | | | SCAC3 |
| 3772 | LIPY | LIPSKY MOVING AND STORAGE CORP | | | SCAC3 |
| 3773 | LIPZ | LAKEVIEW INDUSTRIAL PARK | | | PWRC |
| 3774 | LIQ | Lid Air AB | | S | AVCODES |
| 3775 | LIQ | Lid Air | | | ICAO1 |
| 3776 | LIQB | LIQUID BOX INC | | | SCAC4 |
| 3777 | LIQD | LIQUID TRANSPORT, CORP | | | SCAC3 |
| 3778 | LIQD | LIQUID TRANSPORT, CORP | | | SCAC4 |
| 3779 | LIQE | LAKESHORE ANTIQUES | | | SCAC4 |
| 3780 | LIQF | LIANFENG SHIPPING CO LTD HONG KONG | | | SCAC3 |
| 3781 | LIQL | LIQUID LINES INC | | | SCAC3 |
| 3782 | LIQN | LGS EXPRESS INC | | | SCAC4 |
| 3783 | LIQO | LIQUI FORCE SERVICES USA INC | | | SCAC4 |
| 3784 | LIQR | LIQUID DUSTLAYER TRUCKING | | | SCAC3 |
| 3785 | LIQS | LIQUID SUGAR TRANSPORTATION INC | | | SCAC3 |
| 3786 | LIQS | LIQUIDS IN MOTION | | | SCAC4 |
| 3787 | LIQT | LIQUID TRANSPORT INC | | | SCAC3 |
| 3788 | LIQT | LIQUID TRANSPORT INC | | | SCAC4 |
| 3789 | LIQU | LIQUIMET S.P.A. | | I | BIC |
| 3790 | LIQY | LILLY & ASSOCIATES - INTERNATIONAL | | | SCAC4 |
| 3791 | LIR | Lionair, S.A. | Callsign: Lair, | L | AVCODES |
| 3792 | LIR | Minsk Aircraft Overhaul Plant | Callsign: Lisline, | BY | AVCODES |
| 3793 | LIR | Heli Air | | F | AVCODES |
| 3794 | LIR | Minsk Aircraft Overhaul Plant | | | ICAO1 |
| 3795 | LIRB | LES INSTALLATIONS RE-BAST INC | | | SCAC4 |
| 3796 | LIRC | Louisville & Indiana R.R. Co. | added 7/1994; 7/2000-7/2005 | | NAKINA |
| 3797 | LIRC | Louisville & Indiana R.R. Co. | added 7/94; 7/2000 | | NRHS |
| 3798 | LIRC | LOUISVILLE & INDIANA RAILROAD | | | PWRC |
| 3799 | LIRC | Louisville and Indiana Railroad | | | RSRV |
| 3800 | LIRC | LOUISVILLE & INDIANA RAILROAD COMPA | | | SCAC4 |
