At 7:53pm on 8/25/2016 Caller ID was NPF 548-6756, I answered on the second ring, I said hello, nothing but air on the other side and I waited 20 seconds. I hung up and dialed the number back and all I got was a recording: None of our representatives are available right now.  If you received a call from this number, we should contact you within the next day.  If you believe you received this call by error, please, press 1 to be added to our Do-Not-Call list.: I have no ideal as to whom or what it was but I went ahead and pressed 1, ten minutes later at 8:03pm I received another call, Caller ID was unavailable,  from number 1-512-298-3070, humans on the other line, alot of noise on the other end sounded like a whole lot of telecommunicators and speaking foreign language until I told them to put me on the do not call list, then in english he says okay wrong number....

Called, but no one on the other side

Received phone call and the guy on the other end was speaking Spanish.  I said "no habla engles", he said "no habla espanol" and hung up.  No idea who this was or why they're calling.

Called & left no message. Blocked call.

No message