| 1 | OHC | Jet Select, LLC | Callsign: Ohio-Charter, Merged into Jet Edge. | USA | AVCODES |
| 2 | OHCC | OHIO CARRIER CORPORATION | | | SCAC3 |
| 3 | OHCD | O'HARE COLD CO | | | SCAC4 |
| 4 | OHCN | OHIO CONNECTION | | | SCAC3 |
| 5 | OHCN | OHC INTERMODAL | | | SCAC4 |
| 6 | OHCR | Ohio Central R.R. Inc. | 1/1994-7/2005 | | NAKINA |
| 7 | OHCR | The Columbus & Ohio River R.R. Co. | added 10/1992 | | NAKINA |
| 8 | OHCR | Ohio R.R. System | eliminated 10/1992 | | NAKINA |
| 9 | OHCR | Ohio Central R.R. Inc. | added 7/1988; 1/1994 | | NAKINA |
| 10 | OHCR | Ohio Central R.R. Inc. | added 7/88; 1/94 | | NRHS |
| 11 | OHCR | Ohio R.R. System | eliminated 10/92 | | NRHS |
| 12 | OHCR | The Columbus & Ohio River R.R. Co. | added 10/92 | | NRHS |
| 13 | OHCR | Ohio Central R.R. Inc. | 1/94-7/2000 | | NRHS |
| 14 | OHCR | OHIO CENTRAL RAILROAD, INC. [COLUMBUS & OHIO RIVER RAILROAD CO.] | | | PWRC |
| 15 | OHCR | Ohio Central Railroad | | | RSRV |
| 16 | OHCR | OHIO CENTRAL RAILROAD CO | | | SCAC3 |
| 17 | OHCR | OHIO CENTRAL RAILROAD CO | | | SCAC4 |
| 18 | OHCR | Ohio Central Railroad Inc | | USA | TRAFFIC |
| 19 | OHCX | Stauffer Chemical Co. — Eastern Branch | added 4/1965; 7/1965 (not listed) | | NAKINA |
| 20 | OHCX | Old Hickory Chemical Co. | 7/1932-4/1961; eliminated 1/1965 | | NAKINA |
| 21 | OHCX | Old Hickory Chemical Co. | 4/38-4/61; eliminated 1/65 | | NRHS |
| 22 | OHCX | Stauffer Chemical Co. -- Eastern Branch | added 4/65; 7/65 | | NRHS |
| 23 | OHCX | STAUFFER CHEMICAL CO. - EASTERN BRANCH [OLD HICKORY CHEMICAL CO.] | | | PWRC |
