calls very early in am never leaves message , hangs up

This number calls early in the morning and at least twice a day! I answer and nobody says anything. Then when you call back it just rings continuously. Very annoying.

Student load debt forgiveness program?

I leave my phone on vibrate.  I don't answer this number, but I let it ring in my pants.

Number is from an area where I have no known friends, relatives, or business associations. I don't answer those kind of calls. When no voicemail is left, I don't return those kind of calls. No voicemail was left.