| 1 | OCA | Aserca Airlines, C.A. | IATA: R7, Callsign: Arosca, Ceased operations on 22 May 2018 | YV | AVCODES |
| 2 | OCA | Aeroservicios Carabobo C.A. Aserca | IATA: R7, | YV | AVCODES |
| 3 | OCA | Aserca Airlines | IATA: R7 | | ICAO1 |
| 4 | OCAA | ORCA CANADIAN TRANSPORT LTD | | | SCAC4 |
| 5 | OCAB | OUTSIDE CARRIER | | | SCAC4 |
| 6 | OCAC | OK COAL AND CONCRETE | | | SCAC4 |
| 7 | OCAH | OTAY CARGO | | | SCAC4 |
| 8 | OCAI | OCEAN AIRE INC | | | SCAC4 |
| 9 | OCAL | OCAL TRANSPORT CO | | | SCAC3 |
| 10 | OCAL | ONE FOUR SIX EIGHT ONE FOUR (146814 | | | SCAC4 |
| 11 | OCAM | OTG CARGO | | | SCAC4 |
| 12 | OCAP | OUTLAW CUSTOMS AND PERFORMANCE LTD | | | SCAC4 |
| 13 | OCAQ | OCEANIC LTD INC | | | SCAC3 |
| 14 | OCAR | OCEANAIR INC | | | SCAC3 |
| 15 | OCAR | OCEANAIR INC | | | SCAC4 |
| 16 | OCAS | OCEAN A/S | | | SCAC3 |
| 17 | OCAS | O C T | | | SCAC4 |
| 18 | OCAU | OCEANBOX CONTAINERS LTD | | CY | BIC |
| 19 | OCAU | OCE ANDENO, B.V. | | | SCAC3 |
| 20 | OCAY | OCEANIA TANKER CORPORATION | | | SCAC4 |
