| 4901 | MLHI | MALHI CARRIERS INC | | | SCAC4 |
| 4902 | MLHL | MOON LIGHT EXPRESS LOGISTIC LTD | | | SCAC4 |
| 4903 | MLHN | METAL LAROCHE INC | | | SCAC4 |
| 4904 | MLHR | MELHER TRANSPORT INC | | | SCAC4 |
| 4905 | MLHS | MEELHEIM | | | SCAC4 |
| 4906 | MLHT | MLH TRUCKING | | | SCAC4 |
| 4907 | MLHW | MULTI-CHEM | | | SCAC4 |
| 4908 | MLHX | American Refrigerator Transit Co. | added 7/1983 | | NAKINA |
| 4909 | MLHX | Missouri Improvement Co. | added 10/1971; 1/1975-1/1980; eliminated 7/1983 | | NAKINA |
| 4910 | MLHX | Missouri Improvement Co. | added 10/71; 1/75-1/80 | | NRHS |
| 4911 | MLHX | *MISSOURI IMPROVEMENT CO. | | | PWRC |
| 4912 | MLHX | *RETIRED 09-02-92 ATP (1852)(ART) [AMERICAN REFRIGERATOR TRANSIT CO.] | | | PWRC |
| 4913 | MLHX | American Refrigerator Transit | | | RSRV |
| 4914 | MLI | Air Mali, S.A. | IATA: L9, Callsign: Air Mali, IATA Prefix: 109, Suspended operations on 07 April 2003. Designator L9 reinstated by IATA | RMM | AVCODES |
| 4915 | MLI | Mais Linhas Aereas S.A. | Callsign: Demais, | BR | AVCODES |
| 4916 | MLI | Air Mali | | | ICAO1 |
| 4917 | MLIC | MELLO, INCORPORATED | | | SCAC1 |
| 4918 | MLID | MANNA LOGISTICS INC | | | SCAC4 |
| 4919 | MLIE | MLI TRANSPORT LLC | | | SCAC4 |
| 4920 | MLIF | MASS LOGISTICS INC | | | SCAC4 |
| 4921 | MLIH | MALONE, IRISH, TRUCKING, INC | | | SCAC1 |
| 4922 | MLIH | MACTRANS LOGISTICS INC | | | SCAC4 |
| 4923 | MLII | MANSEE LOGISTICS INC | | | SCAC4 |
| 4924 | MLIN | MOTHERLINES INC | | | SCAC4 |
| 4925 | MLIP | MISSISSIPPI LOGISTICS INC | | | SCAC4 |
| 4926 | MLIR | MALLEY INDUSTRIES INC | | | SCAC4 |
| 4927 | MLIS | MATTHEWS LIME SPREADING LTD | | | SCAC4 |
| 4928 | MLIU | MITSUBISHI CHEMICAL LOGISTICS CORPORATION | | J | BIC |
| 4929 | MLIU | MITSUBISHI CHEMICAL LOGISTICS CORPO | | | SCAC4 |
| 4930 | MLIV | MILLER INTERMODAL LOGISTICS SERVICE | | | SCAC4 |
| 4931 | MLIX | Melbo Land & Investment Co. | 7/2005 (not listed) | | NAKINA |
| 4932 | MLIX | MELBO LAND AND INVESTMENT CO. | | | PWRC |
| 4933 | MLIX | Melbo Land and Investment | | | RSRV |
| 4934 | MLIX | MELBO LAND & | | | SCAC4 |
| 4935 | MLIY | MAYNARDS LOGISTICS INC. | | | SCAC4 |
| 4936 | MLJ | Malmö - Limhamns Järnväg | 1889 - 2000 | S | svenska-lok.se |
| 4937 | MLJ | Malmö-Limhamns Järnväg | | SE | VKM |
| 4938 | MLJC | MILLER, J C ANTIQUE LTD | | | SCAC4 |
| 4939 | MLJG | MLJ TRUCKING INC | | | SCAC4 |
| 4940 | MLJT | MLJ TRUCKING | | | SCAC4 |
| 4941 | MLK | Millennium Air | Callsign: Nigerjet, | WAN | AVCODES |
| 4942 | MLK | Millennium Air | | | ICAO1 |
| 4943 | MLKA | MEDICINE LAKE AG SUPPLY | | | SCAC4 |
| 4944 | MLKC | MULTI-LINK CONTAINER LINE LLC | | | SCAC4 |
| 4945 | MLKD | MLK DELIVERY SERVICE, INC | | | SCAC1 |
| 4946 | MLKD | MLK DELIVERY SERVICE INC | | | SCAC4 |
| 4947 | MLKE | MARSH LAKE TENTS & EVENTS LTD | | | SCAC4 |
| 4948 | MLKF | MAL TRUCKING INC | | | SCAC4 |
| 4949 | MLKJ | MID-ATLANTIC TRUCKING LLC | | | SCAC4 |
| 4950 | MLKK | MACLEAN, K | | | SCAC4 |
| 4951 | MLKL | MLAKER TRANSPORTATION INC | | | SCAC4 |
| 4952 | MLKM | MILLERS TRUCKING | | | SCAC4 |
| 4953 | MLKP | MELKO ENTERPRISES LTD | | | SCAC4 |
| 4954 | MLKQ | MOLITOR, CARL TRUCKING | | | SCAC4 |
| 4955 | MLKT | MALKOWSKI TRUCKING | | | SCAC4 |
| 4956 | MLKU | MATLACK LEASING LLC | | USA | BIC |
| 4957 | MLKU | Matlack Leasing | | | RSRV |
| 4958 | MLKU | MATLACK LEASING LLC | | | SCAC4 |
| 4959 | MLKW | MELEGS LAKEVIEW ORCHARD | | | SCAC4 |
| 4960 | MLKX | Merchants Despatch Transportation Co. | 1/1950-4/1970; eliminated 10/1970 | | NAKINA |
| 4961 | MLKX | Merchants Despatch Transportation Co. (reporting marks for Milk Products Refrigerator Line) | 7/1937-4/1938 | | NAKINA |
| 4962 | MLKX | Milk Products Refrigerator Line (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 4963 | MLKX | Milk Products Refrigerater Line (Merchants Despatch Transportation Corp.) | Apr-38 | | NRHS |
| 4964 | MLKX | Merchants Despatch Transportation Co. | 1/52-4/70; eliminated 10/70 | | NRHS |
| 4965 | MLKX | MERCHANTS DESPATCH TRANSPORTATION CORP. | | | PWRC |
| 4966 | MLKX | MILK PRODUCTS REFRIGERATOR LINE (MERCHANTS DESPATCH TRANSPORTATION CO.) | | | PWRC |
| 4967 | MLL | Aeroclub de Mallorca | Callsign: Mallorca, | E | AVCODES |
| 4968 | MLLA | MOLALLA TRANSPORT SYSTEMS INC | | | SCAC4 |
| 4969 | MLLB | MY LADY LOGISTICS LLC | | | SCAC4 |
| 4970 | MLLD | METAL LOGISTICS INC | | | SCAC4 |
| 4971 | MLLE | MENCAR LLC | | | SCAC4 |
| 4972 | MLLI | M L LOGISTICS LTD | | | SCAC4 |
| 4973 | MLLL | MILLER, L R INC | | | SCAC4 |
| 4974 | MLLM | MACDONELL, JAY | | | SCAC4 |
| 4975 | MLLN | MILLEN TRUCKING LTD | | | SCAC4 |
| 4976 | MLLO | MELLO'S TRUCKIN' | | | SCAC1 |
| 4977 | MLLO | MALLARD OIL | | | SCAC4 |
| 4978 | MLLP | MAIN LINE LLC | | | SCAC4 |
| 4979 | MLLR | MILLER, ROY, FREIGHT LINES, INC | | | SCAC1 |
| 4980 | MLLR | MILLER, ROY FREIGHT LINES LLC | | | SCAC4 |
| 4981 | MLLT | MILLENNIUM TRANSPORT LTD | | | SCAC4 |
| 4982 | MLLU | METRO LOGISTICS INTERNATIONAL (PVT) LTD | | CL | BIC |
| 4983 | MLLU | MANCHESTER LINERS LTD. | | | SCAC4 |
| 4984 | MLLV | MILLS, R E TRANSPORTATION SERVICES | | | SCAC4 |
| 4985 | MLLX | Basell U.S.A., Inc. | added 1/2001; 7/2005 | | NAKINA |
| 4986 | MLLX | Montell U.S.A., Inc. | added 4/1996; 7/2000; eliminated 1/2001 | | NAKINA |
| 4987 | MLLX | Montell U.S.A., Inc. | added 4/96; 7/2000; eliminated 1/2001 | | NRHS |
| 4988 | MLLX | Basell U.S.A., Inc. | added 1/2001 | | NRHS |
| 4989 | MLLX | BASELL USA, INC. [MONTELL USA INCORPORATED] | | | PWRC |
| 4990 | MLLX | Montell USA (Basell USA) | | | RSRV |
| 4991 | MLLX | EQUISTAR CHEMICALS LP | | | SCAC4 |
| 4992 | MLLY | MILES, LYNN E | | | SCAC4 |
| 4993 | MLM | Millennium Air Corporation (MAC) | Callsign: Millennium, | PA | AVCODES |
| 4994 | MLM | Comlux Malta Ltd | Callsign: Luxmalta, | M | AVCODES |
| 4995 | MLMC | MUTUAL MATERIALS CO | | | SCAC4 |
| 4996 | MLMF | MILEMASTER | | | SCAC4 |
| 4997 | MLMG | MULEME, MATHIAS GALLERY INC | | | SCAC4 |
| 4998 | MLMK | M L M TRUCKING | | | SCAC4 |
| 4999 | MLMO | MALT-O-MEAL COMPANY INC | | | SCAC4 |
| 5000 | MLMT | MLM TRUCKING & LOGGING INC | | | SCAC4 |
