| 1 | MPS | Metropolis Noord I.B.V. | IATA: DN, Callsign: Metro Regional, | NL | AVCODES |
| 2 | MPS | Aviajet | | GB | AVCODES |
| 3 | MPS | Metropoliatn Police Air Support Unit | Callsign: Special, | GB | AVCODES |
| 4 | MPS | Metroplis | | | ICAO1 |
| 5 | MPSA | MARSTON, P S ASSOCIATES LLC | | | SCAC4 |
| 6 | MPSB | Mecklenburg-Pommersche Schmalspurbahn-Freunde e.V. | Schwichtenberg | D | privat-bahn.de |
| 7 | MPSB | MAX POWER SHIPPING LIMITED | | | SCAC4 |
| 8 | MPSB | | | DDR | TRAFFIC |
| 9 | MPSC | MISSOURI PUBLIC SERVICE CO. | | | PWRC |
| 10 | MPSD | MULTIPAK POSTAL SERVICE INC | | | SCAC4 |
| 11 | MPSE | MPS ENTERPRISES INC | | | SCAC4 |
| 12 | MPSF | MAPLE STONE FARM | | | SCAC4 |
| 13 | MPSG | MCCORMACK | | | SCAC4 |
| 14 | MPSJ | MOBILE PRODUCTION SERVICE INC | | | SCAC4 |
| 15 | MPSK | MPS TRUCK LINES | | | SCAC4 |
| 16 | MPSN | METRO EXPEDITE | | | SCAC4 |
| 17 | MPSO | MASURIA PEARL SHIPPING GMBH & CO KG | | | SCAC4 |
| 18 | MPSP | MAPLE STAR TRANSPORT LTD | | | SCAC4 |
| 19 | MPSS | MALPASS | | | SCAC4 |
| 20 | MPSU | MODULAR PONTOON SYSTEMS BV | | NL | BIC |
| 21 | MPSV | MATERIAUX PAYSAGERS SAVARIA LTEE | | | SCAC4 |
| 22 | MPSX | Missouri Public Service | 7/2005; eliminated 1/2006 | | NAKINA |
| 23 | MPSX | Missouri Public Service Co. | 1/1994-7/2000 | | NAKINA |
| 24 | MPSX | Missouri Public Service | added 4/1989 | | NAKINA |
| 25 | MPSX | Missouri Public Service Co. | added 10/1968; 4/1970-1/1980; eliminated 4/1989 | | NAKINA |
| 26 | MPSX | Missouri Public Service Co. | added 10/68; 4/70-1/80; eliminated 4/89 | | NRHS |
| 27 | MPSX | Missouri Public Service | added 4/89 | | NRHS |
| 28 | MPSX | Missouri Public Service Co. | 1/94-7/2000 | | NRHS |
| 29 | MPSX | *MISSOURI PUBLIC SERVICE CO. | | | PWRC |
| 30 | MPSX | +AQUILA, INC. | | | PWRC |
| 31 | MPSX | Missouri Public Service | | | RSRV |
| 32 | MPSX | AQUILA INC | | | SCAC4 |
| 33 | MPSZ | MISSOURI PUBLIC SERVICE CO. | | | PWRC |
