| | N4439 | Private | Unallocated | -0001 | Unallocated frame, notes 'Canadian Aircraft Ltd CANADIAN CURTISS', if known please update accordingly |
| | N12280 | Private | Unallocated | -0001 | Unallocated frame, notes 'Fletcher-Sartain Co Aero SPORT', if known please update accordingly |
| | N6071 | Private | Unallocated | -0001 | Unallocated frame, notes 'Smith S-1', if known please update accordingly |
| | N31SA | Private | Unallocated | -0001 | Unallocated frame, notes 'Spinks AKROMASTER', if known please update accordingly |
| | N33612 | Private | Unallocated | -0001 | Unallocated frame, notes 'Stone Lyman K TILLIE TYPE', if known please update accordingly |
| | N485M | Private | Unallocated | 1930 | Unallocated frame, notes 'Glenn Timothy A MONOPLANE ', if known please update accordingly |
| | N966N | Private | Unallocated | 1930 | Unallocated frame, notes 'Sloan Marion A SLOAN', if known please update accordingly |
| | N12741 | Private | Unallocated | 1933 | Unallocated frame, notes 'Vieweg Otto C O V S GLIDER', if known please update accordingly |
| | N1800 | Private | Unallocated | 1983 | Unallocated frame, notes 'Modified E.A.A. BIPLANE', if known please update accordingly |
| | N3523 | Private | Unallocated | 1987 | Unallocated frame, notes 'Scarborough LINCOLN REPLICA', if known please update accordingly |
| | N325S | Private | Unallocated | 1990 | Unallocated frame, notes 'Silfies WARRENCRAFT L2-S', if known please update accordingly |
| | N23CS | Private | Unallocated | 2004 | Unallocated frame, notes 'Homebuilt STOLP SA-300', if known please update accordingly. Owner/Operator Whitman Bruce R |
| | N11813 | Private | Unallocated | 2009 | Unallocated frame, notes 'Homebuilt KC-2 ', if known please update accordingly. Owner/Operator Anderson Jerry J |
| | N87LL | Private | Unallocated | 2018 | Unallocated frame, notes 'Homebuilt REPLICA JU87-B', if known please update accordingly. Owner/Operator Commemorative Air Force |