| 1 | MPT | Miapet-Avia | | | ICAO1 |
| 2 | MPTA | M & P TRANSFER INC | | | SCAC4 |
| 3 | MPTB | M P TRANSPORT | | | SCAC4 |
| 4 | MPTC | MT. PLEASANT TRANSFER, INC | | | SCAC1 |
| 5 | MPTD | MUTCH, P M LTD | | | SCAC4 |
| 6 | MPTE | MARPOLE TRANSPORT LIMITED | | | SCAC4 |
| 7 | MPTF | MAPLETREE TRANSPORTATION INC (BROKE | | | SCAC4 |
| 8 | MPTG | METROPOLITAN TRUCKING INC | | | SCAC4 |
| 9 | MPTH | MAGPIE TECHNOLOGY | | | SCAC4 |
| 10 | MPTL | MISSOURI PACIFIC TRUCK LINES | | | PWRC |
| 11 | MPTN | MARES POINT MARINE SERVICES INC | | | SCAC4 |
| 12 | MPTO | MAP TRANSPORTATION INC | | | SCAC4 |
| 13 | MPTP | MP TRANSPORT | | | SCAC4 |
| 14 | MPTQ | MAPLETREE TRANSPORTATION INC | | | SCAC4 |
| 15 | MPTR | MURPHY HAULING SERVICE, INC | | | SCAC1 |
| 16 | MPTS | MILOS PRODUCT TANKER CORPORATION | | | SCAC4 |
| 17 | MPTV | MARPORT C-TECH LTD | | | SCAC4 |
| 18 | MPTX | Procor Ltd. | added 1/1974; 1/1975-7/2005 | | NAKINA |
| 19 | MPTX | Union Tank Car Co. | added 7/1973; eliminated 1/1974 | | NAKINA |
| 20 | MPTX | Magnolia Provision Co. | 8/1920-7/1923 | | NAKINA |
| 21 | MPTX | Union Tank Car Co. | added 7/73; eliminated 1/74 | | NRHS |
| 22 | MPTX | Procor Ltd. | added 1/74; 1/75-7/2000 | | NRHS |
| 23 | MPTX | *MAGNOLIA PROVISION CO. | | | PWRC |
| 24 | MPTX | +(PROX) PROCOR LIMITED [UNION TANK CAR CO.] | | | PWRC |
| 25 | MPTX | Magnolia Provision Co. (Procor) | | | RSRV |
| 26 | MPTX | PROCOR LIMITED | | | SCAC4 |
