The phones at all of the federal prisons are shut off at 9:30 pm. Usually there is a pretty long line at the end of the evening for calls and if you miss their call after 9:00, they would have to get in the back of the line and wait for another turn. That might be a challenge with all of the inmates waiting to get their last call for the day through, too.
https://www.inmateaid.com/ask-the-inmate/how-late-can-an-inmate-call-from-a-federal-prison#answer
Accepted Answer Date Created: July 10,2016