| 1 | OHPA | Ohio & Pennsylvania R.R. Co. | added 10/1995; 7/2000-7/2005 | | NAKINA |
| 2 | OHPA | Ohio & Pennsylvania R.R. Co. | added 10/95; 7/2000 | | NRHS |
| 3 | OHPA | OHIO & PENNSYLVANIA RAILROAD | | | PWRC |
| 4 | OHPA | Ohio and Pennsylvania Railroad | | | RSRV |
| 5 | OHPA | OHIO & PENNSYLVANIA RAILROAD COMPAN | | | SCAC4 |
| 6 | OHPE | OHIO PACIFIC EXPRESS INC | | | SCAC3 |
| 7 | OHPE | OHIO PACIFIC EXPRESS INC | | | SCAC4 |
| 8 | OHPT | OHIO PIGGYBACK TRANSPORTATION INC | | | SCAC3 |
| 9 | OHPX | Merchants Despatch Transportation Corp. | added 1/1955; 10/1957-4/1961; eliminated 1/1964 | | NAKINA |
| 10 | OHPX | Merchants Despatch Transportation Corp. | 10/57-4/61 | | NRHS |
| 11 | OHPX | MERCHANTS DESPATCH TRANSPORTATION CORP. | | | PWRC |
