Got a call which, even though I know the area code, I didn't answer. That resulted in the expect 2-second "message" of hiss. This would lead me to believe it is a spam/robo call, but I have no other evidence than what I present here.

I did as well and agree it sounds like a spam call. 3rd time they've called in two weeks.

This number calls me every 2 weeks or so...never leaves a message.

Got a call from this number stating that I missed their initial call about student loans I have and about new programs to resolve them..