| 1 | OCL | Over-night Cargo Limited | Callsign: Overnight, | WAN | AVCODES |
| 2 | OCL | OCL (Barbados) Ltd. | Callsign: Soca, | BDS | AVCODES |
| 3 | OCL | OTTUMWA CONNECTING LINE | | | PWRC |
| 4 | OCLA | ONE CLOTHING | | | SCAC4 |
| 5 | OCLC | ONE CALL LOGISTICS AND TRANSPORTATI | | | SCAC4 |
| 6 | OCLD | OCEANIC LIMITED INC | | | SCAC3 |
| 7 | OCLD | OMIMEX CANADA LTD | | | SCAC4 |
| 8 | OCLE | OLYMPIC LINE EXPRESS | | | SCAC3 |
| 9 | OCLE | OCEAN LINK INC | | | SCAC4 |
| 10 | OCLG | OLDCASTLE LAWN & GARDEN INC | | | SCAC4 |
| 11 | OCLH | OSBORNE, CARL L HELICOPTER TRANSPOR | | | SCAC4 |
| 12 | OCLI | OCEAN CONCO LINE INC | | | SCAC3 |
| 13 | OCLI | OCEAN LOGISTICS CORP | | | SCAC4 |
| 14 | OCLK | OCEANLINK SHIPPING LTD. | | | SCAC3 |
| 15 | OCLK | OCEANLINK SHIPPING LTD. | | | SCAC4 |
| 16 | OCLL | OWNERS COURIERS LLC | | | SCAC4 |
| 17 | OCLN | OCEANIC CONTAINER LINE INC | | | SCAC4 |
| 18 | OCLP | ONE CALL LOGISTICS SUPPORT LLC | | | SCAC4 |
| 19 | OCLQ | ONE CALL LOGISTICS SOLUTIONS INC | | | SCAC4 |
| 20 | OCLR | OCEANCOLOUR SHIPPING LTD. | | | SCAC3 |
| 21 | OCLR | ORGANIC CONNECTIONS LTD | | | SCAC4 |
| 22 | OCLT | OCEANLINK INCORPORATED | | | SCAC4 |
| 23 | OCLU | MAERSK A/S | | DK | BIC |
| 24 | OCLU | OVERSEAS CONTAINERS, LTD. | | | PWRC |
| 25 | OCLU | Overseas Containers | | | RSRV |
| 26 | OCLU | OVERSEAS CONTAINER LTD | | | SCAC3 |
| 27 | OCLU | P & O NEDLLOYD BV | | | SCAC4 |
