How to find out if Restricted Area is “hot” before taking off?

For example, I often fly from KCHO to KOXB and almost always get cleared through R-4005 and R-4006. Occasionally they will be hot and I will have to go around, wasting time and fuel compared to if I had planned that route originally.

Is there anyway to call Patuxent Approach (or Washington Center) on the phone ahead of time to ask if the Restricted Area is hot?

Ones without regularly scheduled hot times will say something like 48 hrs in advance or other times by NOTAM.