My Caller ID started to flake out several months ago. Seemed to be around same time I had to replace my broken -DVR/Cable box; but that may or may not be true.
I would go through the self service screens to correct, but finally called support. Was told that something noticed on their end and that 'corrected'. Stopped working next day again.
Every morning I call house from cell phone and no caller ID. I do the self service. Usually don't see the CID, but calling again I see the cell phone number. As a note, I do power down my router nightly.
Hopefully someone from verizon monitors this forum as I don't have patience to sit through a phone call with someone doing another temporary solution.