| 1 | OCE | Helicocean | Callsign: Heliocean, | NC | AVCODES |
| 2 | OCE | Heliocean | | | ICAO1 |
| 3 | OCE | Oregon, California & Eastern Ry. Co. | 1/1975; added 4/1977; 1/1980; eliminated 4/1992; 1/1994 | | NAKINA |
| 4 | OCE | Oregon, California & Eastern Ry. Co. | 1/75-1/80; eliminated 4/92; 1/94 | | NRHS |
| 5 | OCE | RETIRED 06-05-92 (603) ATP [OREGON, CALIFORNIA & EASTERN RY.] | | | PWRC |
| 6 | OCE | Oregon, California and Eastern Railway | | | RSRV |
| 7 | OCEA | OCEANBULK LINE | | | SCAC3 |
| 8 | OCEAN | OceanAir | Real: O6 / ONE | BR | TRAFFIC |
| 9 | OCEANC | Ocean County Department of Transportation Services | City: Toms River, NJ | US-NJ | TRAFFIC |
| 10 | OCEB | OCEAN BEACH TRANSFER & STORAGE, INC | | | SCAC3 |
| 11 | OCEC | OCEAN CITY EXPRESS CO INC | | | SCAC4 |
| 12 | OCEE | OCOEE RIVER TRANSPORT INC | | | SCAC4 |
| 13 | OCEL | OCEAN EXPRESS LINE INC | | | SCAC3 |
| 14 | OCEL | ODIS CRANE & EQUIPMENT LLC | | | SCAC4 |
| 15 | OCEN | OCEAN SPRINGS TRANSFER & STORAGE IN | | | SCAC3 |
| 16 | OCEN | OCEAN SPRINGS TRANSFER & STORAGE IN | | | SCAC4 |
| 17 | OCEO | OCEANO SHIPPING CO INC | | | SCAC4 |
| 18 | OCEQ | OCEAN TRANSPORT | | | SCAC4 |
| 19 | OCET | OCEAN TERMINALS, INC | | | SCAC3 |
| 20 | OCET | OCEAN TERMINALS INC | | | SCAC4 |
| 21 | OCEU | OCEAN EXPRESS COMPANY | | ET | BIC |
| 22 | OCEU | OCEAN EXPRSS COMPANY | | | SCAC4 |
| 23 | OCEX | OREGON COASTLINE EXPRESS | | | PWRC |
