| 1 | RMP | Servicios de Rampa Y Mostrador, S.A. de C.V. | Callsign: Seramsa, | MEX | AVCODES |
| 2 | RMP | Servicios De Rampa Y Mostrador | | | ICAO1 |
| 3 | RMPA | R M P & ASSOCIATES INC | | | SCAC3 |
| 4 | RMPB | RELATIONSHIPS MATTER PUBLISHING INC | | | SCAC4 |
| 5 | RMPD | RATION MAKER PRODUCTS SOUTH INC | | | SCAC3 |
| 6 | RMPD | RH MFG / PEDRO ZARAGOZA | | | SCAC4 |
| 7 | RMPE | RAPTOR MINING PRODUCTS INC | | | SCAC4 |
| 8 | RMPG | RAMPAGE ENTERPRISES INC | | | SCAC4 |
| 9 | RMPN | ROMERO PENA, FRANCISCO (MX-469948) | | | SCAC4 |
| 10 | RMPQ | REGIONAL MUNICIPALITY OF PEEL | | | SCAC3 |
| 11 | RMPQ | ROCKY MOUNTAIN PROPANE EXPRESS INC | | | SCAC4 |
| 12 | RMPR | RAMSEY PISTON RING CO | | | SCAC3 |
| 13 | RMPR | RM PRODUCE | | | SCAC4 |
| 14 | RMPS | RAMPLA SHIPPING COMPANY LIMITED | | | SCAC3 |
| 15 | RMPS | ROMA EXPRESS | | | SCAC4 |
| 16 | RMPV | RAM TRANSPORTATION SERVICES INC | | | SCAC4 |
| 17 | RMPX | Progress Rail Services Corp. | added 10/2004; 7/2005 | | NAKINA |
| 18 | RMPX | Railcar, Ltd. | added 4/2000; 7/2000; eliminated 10/2004 | | NAKINA |
| 19 | RMPX | Railcar, Ltd. | added 4/2000; 7/2000 | | NRHS |
| 20 | RMPX | PROGRESS RAIL SERVICES CORP. [RAILCAR, LTD.] | | | PWRC |
| 21 | RMPX | Progress Rail Services Corporation (Railcar Ltd) | | | RSRV |
| 22 | RMPX | PROGRESS RAIL SERVICES CORPORATION | | | SCAC4 |
| 23 | RMPY | RIMPYS TRANSPORT LTD | | | SCAC4 |
| 24 | RMPZ | *READY MIX PLANT | | | PWRC |
| 25 | RMPZ | *TRANSAMERICA LEASING INC [(REAZ) MISSOURI PACIFIC RAILROAD] | | | PWRC |
| 26 | RMPZ | TAL International | | | RSRV |
| 27 | RMPZ | TRANSAMERICA LEASING, INC. | | | SCAC4 |
