| 1 | OGE | Atlasjet Uuslararasi Havacilik A/S | IATA: 2U, Callsign: Atlasjet, IATA designator changed to KK. Name changed from Atlas International Airlines - Atlas International Havacilik A/S | TR | AVCODES |
| 2 | OGE | Atlasjet Uuslararasi Havacilik A/S | IATA: KK, Callsign: Atlasjet, ICAO designator changed to KKK . IATA designator changed from 2U*. Name changed from Atlas International Airlines - Atlas International Havacilik A/S | TR | AVCODES |
| 3 | OGE | OREGON GREAT EASTERN | | | PWRC |
| 4 | OGED | OSTER, GREGORY ED | | | SCAC4 |
| 5 | OGEE | Ogeechee Ry. Co. | added 10/1989; eliminated 1/1993; 1/1994-7/2000 | | NAKINA |
| 6 | OGEE | Ogeechee Ry. Co. | added 10/89; eliminated 1/93; 1/94-7/2000 | | NRHS |
| 7 | OGEE | OGEECHEE RAILWAY COMPANY | | | PWRC |
| 8 | OGEE | Ogeechee Railway | | | RSRV |
| 9 | OGEE | OGEECHEE RAILWAY COMPANY | | | SCAC3 |
| 10 | OGEG | Österreichische Gesellschaft für Eisenbahngeschichte | | A | TRAFFIC |
| 11 | OGEG | Österreichische Gesellschaft für Eisenbahngeschichte (ÖGEG) | | AT | VKM |
| 12 | OGEM | OGEM TRANSPORT INC | | | SCAC4 |
| 13 | OGEN | OGDEN EXPRESS | | | SCAC3 |
| 14 | OGEP | OVERSEAS GLOBE EXPRESS | | | SCAC4 |
| 15 | OGEX | Oklahoma Gas and Electric Co. | added 7/1976; 1/1980-7/2005 | | NAKINA |
| 16 | OGEX | Oklahoma Gas and Electric Co. | added 7/76; 1/80-7/2000 | | NRHS |
| 17 | OGEX | OKLAHOMA GAS & ELECTRIC COMPANY | | | PWRC |
| 18 | OGEX | Oklahoma Gas and Electric | | | RSRV |
| 19 | OGEX | OKLAHOMA GAS & ELECTRIC | | | SCAC4 |
| 20 | OGEZ | OGDAN ELEVATOR | | | PWRC |
