| Tail Number / N-Number | N644K |
| Manufacturer | STAPLETON BILL |
| Model | RV-6 |
| Year Built | 1999 |
| Manufacturer's Serial Number | 60209 |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Kit Manufacturer | VANS AIRCRAFT INC |
| Kit Model | RV-6 |
| Type of Registrant | Individual |
| Owner Name | ALEXANDER ANTHONY S |
| Street | 785 HCR 4235 |
| City | HILLSBORO |
| State | TX |
| Zip Code | 76645-6000 |
| Region | Southwestern |
| County | Hill County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2000-04-04 |
| Certificate Issue Date | 2019-09-03 |
| Last Action Date | 2022-06-28 |
| Expiration Date | 2029-09-30 |
| Status | Valid Registration |
| Mode S Code | 52072370 |
| Mode S Code Hex | A874F8 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N644K.
| Tail Number / N-Number | N644K |
| Manufacturer | STAPLETON WILLIAM T |
| Model | RV-6 |
| Manufacturer's Serial Number | 217SS |
| 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 | Individual |
| Owner Name | STAPLETON WILLIAM T |
| Street | 14708 30TH AVE NE APT A |
| City | SEATTLE |
| State | WA |
| Zip Code | 98155 |
| County | Hill County |
| Country | US |
| Certificate Issue Date | 1995-08-25 |
| Last Action Date | 1995-08-25 |
| Last Status | Valid Registration |
| Cancellation Date | 1998-01-16 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N644K.
| Tail Number / N-Number | N644K |
| Manufacturer | CESSNA |
| Model | DC6B |
| Manufacturer's Serial Number | 216 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 | Individual |
| Owner Name | LOWMAN JOHN RAY |
| Street | 540 N W 24TH ST |
| City | MIAMI |
| State | FL |
| Zip Code | 33101 |
| Region | Southern |
| County | Hill County |
| Certificate Issue Date | 1935-05-22 |
| Last Status | Valid Registration |
| Cancellation Date | 1935-06-04 |