Yes quite a lot, take out USAF F15's etc drops it quite a bit but there are still a good amount, some because they are not on the database yet as they are so new.
Within the last week I have the following examples:
A8802F USA, Nothing in Airframes either
a3201b = N300JA
49D116 Czech, nothing in Airframes either
0D0431 = XA-FAS details were in Airframes but not the hex code, forwarded on
AA6CD2 = N771AV
4D203B = 9H-AFP
4CA852 nothing but on its delivery flight to Ryanair and not on Airframes
AE10EA - 2004 USCG
Alan
Edited to add, GAS now have 49D116 as OK-XLS