Got a call from this number today and when I answered there was no response. I figured it to be a robo call but I called the number back anyway just in case. In doing so I got a message saying "The Google subscriber you called is not available at this time..."

The Google Subscriber is not available at this time, please leave a message....

I just got the same exact thing this morning. I've gotten several lately from different numbers. But this exact number today. It's really weird. Ever figure anything out with it?