I answered the call from this number and there was a lot of background noise, like a call center. The female identified herself and stated where she was from but I couldn't hear her and asked her to repeat it. She became belligerent and told me that if I was listening I would hear her. She said that I had a real problem and hung up on me. unreal!
My call waiting beeped that I was receiving a call from the above number. I didn't recognize the number so did not switch over. They called again from the same number 5 minutes later. I was still on the same call and did not switch over. When I hung up from my call I checked my voicemail but there were no messages. I did a look up and it showed the number as unknown. So out of curiosity I called the number back and got a recorded message saying the number is not in service.
This is apparently another scam robo calling number. I have gotten them before but from a different number. Changing the number appears to be an effort to keep the scam goning while avoiding getting nailed by the authorities. Now anytime my caller ID says "unknown" or "name not found" I don't answer and immediately check it on this or similar websites before calling back.