| 1 | SEH | Waglisla Air, Inc. | Callsign: Sea Hawk, | CDN | AVCODES |
| 2 | SEH | Sky Express S.A. | IATA: G3, Callsign: Air Crete, IATA Designator changed to GQ | GR | AVCODES |
| 3 | SEH | Sky Express S.A. | IATA: GQ, Callsign: Air Crete, IATA Designator changed from G3* | GR | AVCODES |
| 4 | SEH | Sky Express | | | ICAO1 |
| 5 | SEH | Süddeutsches Eisenbahnmuseum Heilbronn e.V. | Heilbronn | D | privat-bahn.de |
| 6 | SEH | Süddeutsches Eisenbahnmuseum Heilbronn | | D | TRAFFIC |
| 7 | SEH | Süddeutsches Eisenbahnmuseum Heilbronn | | DE | VKM |
| 8 | SEHA | SAYERS EXCAVATING & HAULING | | | SCAC4 |
| 9 | SEHC | STEELCASE | | | SCAC4 |
| 10 | SEHI | S E I LOGISTICS | | | SCAC4 |
| 11 | SEHJ | SNIPES EQUIPMENT FABRICATORS INC | | | SCAC4 |
| 12 | SEHO | STEFAN HAY COMPANY | | | SCAC4 |
| 13 | SEHP | SEA LEGEND SHIPPING CO | | | SCAC4 |
| 14 | SEHR | Stiftung Museumsbahn SEHR & RS | | CH | VKM |
| 15 | SEHS | SE SHIPPING LINES PTE LTD | | | SCAC4 |
| 16 | SEHW | SEAHAWK TRANSPORT | | | SCAC4 |