| Tail Number / N-Number | N123HF |
| Manufacturer | FRENTZEL HERMAN E |
| Model | SONEX AIRCRAFT ONEX |
| Year Built | 2012 |
| Manufacturer's Serial Number | ONX0026 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AEROCONVER |
| Engine Model | AEROVEE |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 80 hp (60 kW) |
| Kit Manufacturer | SONEX AIRCRAFT LLC |
| Kit Model | ONEX |
| Type of Registrant | Individual |
| Owner Name | FRENTZEL HERMAN E |
| Street | 1005 S ELISEO DR |
| City | GREENBRAE |
| State | CA |
| Zip Code | 94904-2149 |
| Region | Western-Pacific |
| County | Marin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2013-08-28 |
| Certificate Issue Date | 2016-07-26 |
| Last Action Date | 2022-05-07 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 50057614 |
| Mode S Code Hex | A05F8C |