| 4801 | MLCD | MATERIALES Y COMPLEMENTOS INDUSTRIA | | | SCAC4 |
| 4802 | MLCF | M L & C TRUCKING LLC | | | SCAC4 |
| 4803 | MLCI | MOULEBEC INC | | | SCAC4 |
| 4804 | MLCK | MATLOCK TRANSPORT | | | SCAC4 |
| 4805 | MLCL | MLC LOGISTICS INC | | | SCAC4 |
| 4806 | MLCM | MYRTLE LEASING CO | | | SCAC4 |
| 4807 | MLCN | MT LOGISTICS CORP | | | SCAC4 |
| 4808 | MLCQ | MULE CITY TRUCKING INC | | | SCAC4 |
| 4809 | MLCT | MCLEAN CARGO SPECIALISTS INC | | | SCAC4 |
| 4810 | MLCU | TEXTAINER EQUIPMENT MANAGEMENT LTD | | BM | BIC |
| 4811 | MLCU | N.Y.K. LINE | | | PWRC |
| 4812 | MLCU | N.Y.K. Line | | | RSRV |
| 4813 | MLCU | TEXTAINER EQUIPMENT MANAGEMENT LIMI | | | SCAC4 |
| 4814 | MLCW | MCLEAN CARGO SPECIALISTS | | | SCAC4 |
| 4815 | MLCX | American Refrigerator Transit Co. | added 7/1970; 1/1975-7/2005; eliminated 1/2010 | | NAKINA |
| 4816 | MLCX | American Refrigerator Transit Co. | added 7/70; 1/75-7/2000 | | NRHS |
| 4817 | MLCX | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 4818 | MLCX | American Refrigerator Transit | | | RSRV |
| 4819 | MLCX | AMERICAN REFRIGERATOR TRANSIT CO. | | | SCAC4 |
| 4820 | MLD | Air Moldova | IATA: 9U, Callsign: Air Moldova, IATA Prefix: 572, Designator 9U reinstated by IATA | MD | AVCODES |
| 4821 | MLD | Air Moldova | IATA: 9U | | ICAO1 |
| 4822 | MLD | Midland | 1/1975-1/1980 | | NAKINA |
| 4823 | MLD | Midland Ry. Co. of Manitoba | 4/1938-10/1966 | | NAKINA |
| 4824 | MLD | Midland Ry. Co. of Manitoba | 4/38-10/66 | | NRHS |
| 4825 | MLD | Midland | 1/75-1/80 | | NRHS |
| 4826 | MLD | MIDLAND RY. CO. OF MANITOBA | | | PWRC |
| 4827 | MLD | Midland Railway Co. of Manitoba | | | RSRV |
| 4828 | MLD | Marineluchtvaartdienst | The Netherlands Naval Aviation Service (Dutch: Marineluchtvaartdienst) is the naval aviation branch of the Royal Netherlands Navy. | NL | TRAFFIC |
| 4829 | MLDA | MATILDA SHIPPING LTD | | | SCAC4 |
| 4830 | MLDE | MONARCH LITHO DE MEXICO S A DE C V | | | SCAC4 |
| 4831 | MLDH | MANI | | | SCAC4 |
| 4832 | MLDJ | MLD & SONS INDUSTRIES LLC | | | SCAC4 |
| 4833 | MLDK | MACLEOD TRUCKING | | | SCAC4 |
| 4834 | MLDM | MONROE, L D TRUCKING | | | SCAC4 |
| 4835 | MLDO | MORENO, ALBERTO/LAREDO TRUCKING LLC | | | SCAC4 |
| 4836 | MLDV | MAUL, DAVID | | | SCAC4 |
| 4837 | MLDW | MANCHES | | | SCAC4 |
| 4838 | MLE | Moldaeroservice | Callsign: Moldaero, | MD | AVCODES |
| 4839 | MLE | Moldaeroservice | | | ICAO1 |
| 4840 | MLEC | MILLER, E C & CO | | | SCAC4 |
| 4841 | MLEF | M & L EQUIPMENT LLC | | | SCAC4 |
| 4842 | MLEG | ML EXPRESS DELIVERY INC | | | SCAC4 |
| 4843 | MLEH | MAIN LINE EXPRESS LLC | | | SCAC4 |
| 4844 | MLEK | MALEK, JIM TRUCKING | | | SCAC4 |
| 4845 | MLEL | MILLER, L A | | | SCAC4 |
| 4846 | MLEP | MILLERS E A ENTERPRISES | | | SCAC4 |
| 4847 | MLEQ | MAC DONALD, L. C | | | SCAC1 |
| 4848 | MLER | MACLEAN, EURIE | | | SCAC4 |
| 4849 | MLEV | MIACHART LLC | | | SCAC4 |
| 4850 | MLEW | MCNEISH, LEE WILLIAM | | | SCAC4 |
| 4851 | MLEX | Miles Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 4852 | MLEX | Bulk Equipment Specialist | 1/1994 (not listed) | | NAKINA |
| 4853 | MLEX | Bulk Equipment Specialist | Jan-94 | | NRHS |
| 4854 | MLEX | Miles Inc. | Jul-00 | | NRHS |
| 4855 | MLEX | *BULK EQUIPMENT SPECIALIST | | | PWRC |
| 4856 | MLEX | +MILES INC. | | | PWRC |
| 4857 | MLEX | Miles Inc. | | | RSRV |
| 4858 | MLF | Amal Airlines | Callsign: Amal, | DJI | AVCODES |
| 4859 | MLF | Amal Airlines | | | ICAO1 |
| 4860 | MLFA | MELVIN FARMS | | | SCAC4 |
| 4861 | MLFB | MARANATHA LOGISTICS LLC | | | SCAC4 |
| 4862 | MLFE | MAPLE LEAF ENVIRONMENTAL LTD | | | SCAC4 |
| 4863 | MLFH | MAPLE LEAF HOMES INC | | | SCAC4 |
| 4864 | MLFJ | MALOON TRANSPORTATION LLC | | | SCAC4 |
| 4865 | MLFK | MASELLA, FRANK | | | SCAC4 |
| 4866 | MLFL | MEXICO LINDO FOOD MARKET LLC | | | SCAC4 |
| 4867 | MLFM | MACLEOD FARM CENTRE | | | SCAC4 |
| 4868 | MLFN | MARSHALL FINE ARTS LTD | | | SCAC4 |
| 4869 | MLFP | MAPLE LEAF FOREST PRODUCTS INC | | | SCAC4 |
| 4870 | MLFR | Mainline Freight | | GB | TRAFFIC |
| 4871 | MLFT | MIDLAND TRANSPORT INC | | | SCAC4 |
| 4872 | MLFU | MARVEL LOGISTICS PTE LTD | | SGP | BIC |
| 4873 | MLFV | MAPLE LEAF DISTRIBUTION SERVICES IN | | | SCAC4 |
| 4874 | MLG | Malagasy Airlines | | RM | AVCODES |
| 4875 | MLG | Malagasy Airlines | | | ICAO1 |
| 4876 | MLGB | MARTAL LOGISTICS GROUP LLC | | | SCAC4 |
| 4877 | MLGC | MCLING TRUCKING | | | SCAC4 |
| 4878 | MLGD | MOL LOGISTICS (USA) INC | | | SCAC4 |
| 4879 | MLGE | MOCKLER, GLENN & SONS LTD | | | SCAC4 |
| 4880 | MLGG | MILLER, LARRY G | | | SCAC4 |
| 4881 | MLGH | MOONLIGHT FUEL INC | | | SCAC4 |
| 4882 | MLGI | MILLENNIUM LOGISTICS LLC | | | SCAC4 |
| 4883 | MLGL | MARLAGO LINES | | | PWRC |
| 4884 | MLGM | MCA LOGISTICS | | | SCAC4 |
| 4885 | MLGN | MLG TRUCKING INC | | | SCAC4 |
| 4886 | MLGP | MLG TRANSPORT INC | | | SCAC4 |
| 4887 | MLGQ | MILLENNIUM LOGISTICS SA DE CV | | | SCAC4 |
| 4888 | MLGT | MALMGREN TRUCKING | | | SCAC4 |
| 4889 | MLGU | MOLGAS ENERGIA, SAU | | E | BIC |
| 4890 | MLGW | MCG LOGISTICS | | | SCAC4 |
| 4891 | MLGY | MASTER LOGILITY GROUP LLC | | | SCAC4 |
| 4892 | MLH | ALH Airlines Ltd. | Callsign: South Wind, Name changed to Avion Express Malta Ltd. | M | AVCODES |
| 4893 | MLH | Mahalo Air, Inc. | IATA: 8M, Callsign: Mahalo, | USA | AVCODES |
| 4894 | MLH | Avion Express Malta Ltd. | Callsign: South Wind, Name changed from ALH Airlines Ltd. | M | AVCODES |
| 4895 | MLH | Mahalo Air | | | ICAO1 |
| 4896 | MLHC | MAIN LINE | | | SCAC1 |
| 4897 | MLHC | MAIN LINE HAULING CO LLC | | | SCAC4 |
| 4898 | MLHD | MOUNTAIN LOGISTICS INC | | | SCAC4 |
| 4899 | MLHF | M & L TRUCKING | | | SCAC4 |
| 4900 | MLHG | MILLER, CHAD TRUCKING LLC | | | SCAC4 |
