| 1 | OHS | Odengene Air Shuttle Services Limited | Callsign: Odengene, | WAN | AVCODES |
| 2 | OHSB | OHIO-SEABOARD TRANSIT INC | | | SCAC3 |
| 3 | OHSC | OHIO STAVE COMPANY | | | SCAC3 |
| 4 | OHSE | OHIO STEEL EXPRESS INC | | | SCAC3 |
| 5 | OHSE | OKANAGAN HOT SHOT ENTERPRISES LTD | | | SCAC4 |
| 6 | OHSG | OHIO STANDARD MILEAGE AND/OR RATE F | | | SCAC3 |
| 7 | OHSH | OHARE SHUTTLE INC | | | SCAC3 |
| 8 | OHSH | OFFSHORE HEAVY TRANSPORT AS | | | SCAC4 |
| 9 | OHSI | OHIO SWIFTWAY INC | | | SCAC3 |
| 10 | OHSO | OSHCO INC | | | SCAC3 |
| 11 | OHSQ | OZBURN HESSEY DISTRIBUTION CO | | | SCAC3 |
| 12 | OHSS | OHIO SECURITY SYSTEMS INC | | | SCAC3 |
| 13 | OHST | OHSE TRANSPORTATION INC | | | SCAC3 |
| 14 | OHSV | OHARE SERVICES INC | | | SCAC3 |
| 15 | OHSW | OHSWALDT, RAYMOND | | | SCAC3 |
| 16 | OHSX | Schoenwald Petroleum Co. | 1/1946-1/1950 | | NAKINA |
| 17 | OHSX | O.H. Schoenwald | 1/1943-1/1945 | | NAKINA |
| 18 | OHSX | SCHOENWALD PETROLEUM CO. [O. H. SCHOENWALD] | | | PWRC |
