Shaun wrote:
We don't have this presently, but it's something we're looking into.
Be aware there appear to be a number of sources for the information. For example, FltPlan and ForeFlight use data which goes back a way to get a better sample of clearances while Aerovie has a more limited temporal selection. So, in one, if clearances are more than a week or two old, you might get nothing. In another, you would see them.