There are still some mysteries regarding some U.S. Air Force Boeing 757s. Below you can find different aircraft which have not been positively identified:
02-5001
| Date | Registration | Remarks |
|---|---|---|
| 18/11/2001 | 02-5001 | at Ramstein Air Base with "U.S. Air Force" titles. |
| 19/11/2005 | 02-5001 | at Davis Monthan AFB in all white c/s with "United States Air Force" titles. |
| 09/12/2005 | 02-5001 | at Montgomery in all white c/s with "United States Air Force" titles. |
| 20/09/2010 | 02-5001 | at Ponce (Puerto Rico) in all white c/s with "U.S. Air Force" titles (photo proof). |
| 30/04/2013 | 02-5001 | at Fort Campbell in all white c/s with "U.S. Air Force" titles. |
| 28/01/2014 | 02-5001 | using S-mode AE0433 |
| 25/04/2015 | 02-5001 | at Everett in all white c/s with "U.S. Air Force" titles. |
98-6006
| Date | Registration | Remarks |
|---|---|---|
| 24/03/2000 | 98-6006 | c/n 25493; reported as being leased to United States Air Force. |
| 16/05/2015 | 98-6006 | at Tel Aviv in all white c/s with "U.S. Air Force" titles. |
99-6143
| Date | Registration | Remarks |
|---|---|---|
| 06/12/2004 | 99-6143 | at Stuttgart in all white c/s with "U.S. Air Force" titles (photo proof). |
| 18/10/2009 | 99-6143 | at Stuttgart in all white c/s with "U.S. Air Force" titles (photo proof) using mode S AE0446. |
| 19/06/2010 | 99-6143 | at Gander in all white c/s with "U.S. Air Force" titles (photo proof). |
| 31/08/2010 | 99-6143 | at Warsaw in all white c/s with "U.S. Air Force" titles (photo proof). |
| 11/09/2010 | 99-6143 | at Stuttgart in all white c/s with "U.S. Air Force" titles (photo proof). |
| 14/09/2010 | 99-6143 | at Warsaw in all white c/s with "U.S. Air Force" titles (photo proof). |
| 17/09/2010 | 99-6143 | at Warsaw in all white c/s with "U.S. Air Force" titles (photo proof). |
| 10/09/2012 | 99-6143 | at Cologne in all white c/s with "U.S. Air Force" titles (photo proof). |
| 27/10/2012 | 99-6143 | at Aviano in all white c/s with "U.S. Air Force" titles (photo proof). |
| 14/04/2013 | 99-6143 | at Stuttgart in all white c/s with "U.S. Air Force" titles (photo proof). |
| 18/04/2013 | 99-6143 | at Stuttgart in all white c/s with "U.S. Air Force" titles (photo proof). |
| 24/06/2013 | 99-6143 | at Stuttgart in all white c/s with "U.S. Air Force" titles (photo proof). |
| 27/06/2013 | 99-6143 | at Aviano in all white c/s with "U.S. Air Force" titles (photo proof). |
| 28/09/2014 | 99-6143 | at Cologne in all white c/s with "U.S. Air Force" titles (photo proof). |