Aircraft Registrations

Flightaware already allows one to track the registration of an aircraft registered in the US. Using that function, the site displays which flights the particular A/C has operated, currently operates and will operate in the near future.
Why is it in turn not possible to see the reg. when searching for flights between two cities (i.e. JFK-ATL) or a flight number?

Marius, this question has been done to death by several people, including myself. Unfortunately information is not forthcoming from the admins on anything ‘registration’ related it seems. There are about 12 other threads still unanswered. :confused:

Okay, let’s hope they will add this feature in the future. Thank you anyway.