| 1 | MCC | Aerocom | | MD | AVCODES |
| 2 | MCC | MCC Aviation | | ZA | AVCODES |
| 3 | MCC | MCC Aviation | | | ICAO1 |
| 4 | MCC | MORRIC COUNTY CENTRAL | | | PWRC |
| 5 | MCCC | MILLER, CHRIS C | | | SCAC4 |
| 6 | MCCD | McCARTHY DRAYING CO | | | SCAC1 |
| 7 | MCCD | MCCARTHY DRAYING COMPANY | | | SCAC4 |
| 8 | MCCE | MCMILLAN CRANE SERVICE INC | | | SCAC4 |
| 9 | MCCG | MCCOLLISTERS TRANSPORTATION SYSTEMS | | | SCAC4 |
| 10 | MCCH | MCCONCHIE TRUCKING LTD | | | SCAC4 |
| 11 | MCCI | MEMPHIS CITY CARTAGE INC | | | SCAC4 |
| 12 | MCCJ | MCCULLAGH, J | | | SCAC4 |
| 13 | MCCK | MCCLINTOCK INCORPORATED | | | SCAC4 |
| 14 | MCCL | MASON CITY & CLEAR LAKE ELECTRIC RAILWAY HISTORICAL SOCIETY | | | PWRC |
| 15 | MCCO | MOBILE CHEMICAL CO. | | | PWRC |
| 16 | MCCO | MCCORMICK AND MCCORMICK INC | | | SCAC4 |
| 17 | MCCP | MUSKOGEE CITY-COUNTY PORT AUTHORITY | | | PWRC |
| 18 | MCCP | MCCOPIER CANADA INC | | | SCAC4 |
| 19 | MCCQ | MCC TRANSPORT SINGAPORE PTE LTD | | | SCAC4 |
| 20 | MCCS | MARNA CONSTRUCTION LTD | | | SCAC4 |
| 21 | MCCT | MOSHER, C & C TRUCKING LLC | | | SCAC4 |
| 22 | MCCU | MAXON C&T CORPORATION LIMITED | | HK | BIC |
| 23 | MCCX | Mt. Vernon Transfer Terminal, LLC | added 10/2000; eliminated 7/2002; 7/2005 (not listed) | | NAKINA |
| 24 | MCCX | Mt. Vernon Coal Transfer Co. | added 1/1983; 1/1994-7/2000; eliminated 10/2000 | | NAKINA |
| 25 | MCCX | Madison Coal Corp. | 4/1961 | | NAKINA |
| 26 | MCCX | Mutual Chemical Division, Allied Chemical & Dye Corp. | eliminated 7/1958 | | NAKINA |
| 27 | MCCX | Madison Coal Corp. | added 1/1961; eliminated 7/1963 | | NAKINA |
| 28 | MCCX | Mutual Chemical Division, Allied Chemical and Dye Corp. | added 7/1955; 10/1957 | | NAKINA |
| 29 | MCCX | Mutual Chemical Co. of America | 7/1937-7/1954; eliminated 7/1955 | | NAKINA |
| 30 | MCCX | Mutual Chemical Co. of America | 4/38-1/52; eliminated 7/55 | | NRHS |
| 31 | MCCX | Mutual Chemical Division, Allied Chemical and Dye Corp. | added 7/55; 10/57 | | NRHS |
| 32 | MCCX | Madison Coal Corp. | eliminated 7/63 | | NRHS |
| 33 | MCCX | Mutual Chemical Division, Allied Chemical & Dye Corp. | eliminated 7/58 | | NRHS |
| 34 | MCCX | Madison Coal Corp. | Apr-61 | | NRHS |
| 35 | MCCX | Mt. Vernon Coal Transfer Co. | added 1/83; 1/94-7/2000; eliminated 10/2000 | | NRHS |
| 36 | MCCX | Mt. Vernon Transfer Terminal, LLC | added 10/2000 | | NRHS |
| 37 | MCCX | *MUTUAL CHEMICAL DIV., ALLIED CHEMICAL & DYE CORP. | | | PWRC |
| 38 | MCCX | *MADISON COAL CORP. | | | PWRC |
| 39 | MCCX | +MT. VERNON TRANSFER TERMINAL, LLC [MT. VERNON COAL TRANSFER CO.] | | | PWRC |
| 40 | MCCX | Mount Vernon Coal Transfer | | | RSRV |
| 41 | MCCX | MT VERNON TRANSFER TERMINAL LLC | | | SCAC4 |
| 42 | MCCZ | MORTON CHEMICAL CO. | | | PWRC |
