| Tail Number / N-Number | N20SX |
| Manufacturer | SONEX AIRCRAFT LLC |
| Model | SONEX B |
| Manufacturer's Serial Number | 001 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | LLC |
| Owner Name | SONEX AIRCRAFT LLC |
| Street | 511 AVIATION RD |
| City | OSHKOSH |
| State | WI |
| Zip Code | 54902-7145 |
| Region | Great Lakes |
| County | Winnebago County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2016-03-19 |
| Last Action Date | 2021-10-19 |
| Expiration Date | 2029-03-31 |
| Status | Valid Registration |
| Mode S Code | 50310520 |
| Mode S Code Hex | A19150 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N20SX.
| Tail Number / N-Number | N20SX |
| Manufacturer | SONEX LTD |
| Model | SONEX |
| Manufacturer's Serial Number | 002 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | SONEX LTD |
| Street | 167 N OAKWOOD RD |
| City | OSHKOSH |
| State | WI |
| Zip Code | 54904-7830 |
| County | Winnebago County |
| Country | US |
| Certificate Issue Date | 1998-06-22 |
| Last Action Date | 1998-06-22 |
| Last Status | Valid Registration |
| Cancellation Date | 1999-05-12 |
| Exported To | ITALY |