| Tail Number / N-Number | N121EX |
| Manufacturer | STEPHEN MAILLOUX |
| Model | CCK-1865 |
| Manufacturer's Serial Number | CCK-1865-1005 |
| 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 |
| Kit Manufacturer | CUB CRAFTERS INC |
| Kit Model | CCK-1865 |
| Type of Registrant | Individual |
| Owner Name | MAILLOUX STEPHEN L |
| Street | 12240 WAGNER ST |
| City | ANCHORAGE |
| State | AK |
| Zip Code | 99516-2025 |
| Region | Alaskan |
| County | Anchorage Municipality |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2021-08-04 |
| Last Action Date | 2021-08-04 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 50053743 |
| Mode S Code Hex | A057E3 |