| 1 | GEN | Business Operations Support Services | | GB | AVCODES |
| 2 | GEN | Genair Ltd. | IATA: EN, Callsign: Genair, | GB | AVCODES |
| 3 | GEN | Genavco Air Ltd. d/b/a Westminster Aviation | Callsign: Genavco, | GB | AVCODES |
| 4 | GEN | MAM Aviation Ltd. | ICAO designator changed to WSY | GB | AVCODES |
| 5 | GEN | GENSA | | | ICAO1 |
| 6 | GEN | GENES CASINO TOURS INC | | | SCAC4 |
| 7 | GENA | GEN MANUFACTURING LIMITED | | | SCAC4 |
| 8 | GENC | GREENFLEET | | | SCAC1 |
| 9 | GENC | GENCO TECHNOLOGIES INC | | | SCAC4 |
| 10 | GEND | GENESIS INTERMODAL DELIVERY INC | | | SCAC4 |
| 11 | GENDF | Gendarmerie national | | F | TRAFFIC |
| 12 | GENE | GENES TRANSFER | | | SCAC1 |
| 13 | GENE | GENES TRANSFER | | | SCAC4 |
| 14 | GENF | GENERAL FREIGHT | | | SCAC4 |
| 15 | GENFER | Genio Ferroviari | | I | TRAFFIC |
| 16 | GENG | GENTRY, GARY WILLIAM SANDS | | | SCAC4 |
| 17 | GENI | GLANCEY ENTERPRISES | | | SCAC4 |
| 18 | GENI | Genifer | | F | TRAFFIC |
| 19 | GENIAL | Genial Bus Company | City: London | GB | TRAFFIC |
| 20 | GENK | GLIDDEN TRUCKING | | | SCAC4 |
| 21 | GENL | GREEN, LARRY INC | | | SCAC4 |
| 22 | GENM | GENCOM, INC | | | SCAC1 |
| 23 | GENN | GENPRO INC | | | SCAC4 |
| 24 | GENO | GENERAL TRANSPORTATION INC | | | SCAC4 |
| 25 | GENPORT | Port of Genova | | I | TRAFFIC |
| 26 | GENR | GENMAR TRANSPORTATION INC | | | SCAC4 |
| 27 | GENT | GENESIS TRANSPORT INC | | | SCAC4 |
| 28 | GENT | | City: Gent | B | TRAFFIC |
| 29 | GENTOUR | Geneve-Tours | City: Vernier | CH | TRAFFIC |
| 30 | GENU | GCATAINER BV | | NL | BIC |
| 31 | GENU | GCATAINER BV | | | SCAC4 |
| 32 | GENV | GREENS ENERGY SERVICES INC | | | SCAC4 |
| 33 | GENX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 34 | GENX | General Electric Railcar Services Corp. | added 10/1988; 1/1994; eliminated 1/2000 | | NAKINA |
| 35 | GENX | Gentner Packing Co., Inc. | added 7/1969; 4/1970; eliminated 4/1974; 1/1975-1/1980 | | NAKINA |
| 36 | GENX | Gentner Packing Co., Inc. | added 7/69; 4/70; eliminated 4/74; 1/75-1/80 | | NRHS |
| 37 | GENX | General Electric Railcar Services Corp. | added 10/88; 1/94; eliminated 1/2000 | | NRHS |
| 38 | GENX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 39 | GENX | *GENTNER PACKING CO., INC. | | | PWRC |
| 40 | GENX | +GE RAIL SERVICES {NATX) [GE RAILCAR SERVICES CORPORATION} | | | PWRC |
| 41 | GENX | GE Rail Services | | | RSRV |
| 42 | GENX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
