| 1 | HER | Hex'Air | IATA: UD, Callsign: Hex Airline, Merged with Twin Jet during January 2017. | F | AVCODES |
| 2 | HER | Hera Flight | Callsign: Hera, | USA | AVCODES |
| 3 | HERA | HERONS SA DE CV | | | SCAC4 |
| 4 | HERA | Compagnie des chemins de fer d’intérêt local du département de l’Hérault | | PF | TRAFFIC |
| 5 | HERB | HERRINGTON, M C DISTRIBUTORS INC | | | SCAC4 |
| 6 | HERD | HICKMANS EGG RANCH INC | | | SCAC4 |
| 7 | HERE | HEREDIA TRUCKING COMPANY | | | SCAC4 |
| 8 | HERF | Herforder Kleinbahn | | D | TRAFFIC |
| 9 | HERG | H E R TRUCKING INC | | | SCAC4 |
| 10 | HERI | HERITAGE DISTRIBUTION LLC | | | SCAC4 |
| 11 | HERIK | Herik Rail | | NL | TRAFFIC |
| 12 | HERING | HERING Gleisbau | | D | TRAFFIC |
| 13 | HERJ | HERRTWICH | | | SCAC4 |
| 14 | HERK | HERRIN TRUCKING LLC | | | SCAC4 |
| 15 | HERLI | Herlitschka Busreisen | | D | TRAFFIC |
| 16 | HERMES | Hermes Groep NV | Owned by Connexxion | NL | TRAFFIC |
| 17 | HERMS | Harmsdorf Reisen | | D | TRAFFIC |
| 18 | HEROS | Helvetia Rolling Stock GmbH | | CH | TRAFFIC |
| 19 | HEROS | HEROS Helvetia Rolling Stock GmbH | | CH | VKM |
| 20 | HERR | HERRIN TRANSPORTATION CO | | | PWRC |
| 21 | HERR | HERRERA, A TRANSPORT | | | SCAC4 |
| 22 | HERS | HERMOR TRANSPORTES | | | SCAC4 |
| 23 | HERTZ | | | USA | TRAFFIC |
| 24 | HERU | HERC RENTALS | | USA | BIC |
| 25 | HERX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 26 | HERX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 1/2000 | | NAKINA |
| 27 | HERX | North American Car Corp. | 1/1950-1/1980; eliminated 1/1984 | | NAKINA |
| 28 | HERX | Hershey Chocolate Co. (North American Car Corp.) | 7/1932-7/1935 | | NAKINA |
| 29 | HERX | North American Car Corp. | 1/52-1/80 | | NRHS |
| 30 | HERX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 31 | HERX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 32 | HERX | (NATX) GEN. ELECTRIC RAIL SERVICES CORP. (HERSHEY FOOD PROD.- LESSEE) {NORTH AMERICAN CAR CO.] | | | PWRC |
| 33 | HERX | Hershey Foods (GE Rail Services Corporation) | | | RSRV |
| 34 | HERX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 35 | HERX | Hershey Chocolate Co. | | USA | TRAFFIC |