I think that you are getting a reasonably sophisticated robo call from a very friendly computer. A number of scammers now structure their scripts to suggest that you are listening to a real person, for example, by asking if you can hear them before pausing a few seconds for you to respond. No number - home, cell or work - is safe because enough people fall for the scam to make it profitable to the scammers.
I keep getting calls from this number. Don't answer as don't recognize it. Don't leave a message. Cell is on the Do Not Call list, what a joke! Not working.
Ok I got a call from this number that said can you hear me and I said yea and the computer said great now you registered for some visa for 200$ And I said I'm not falling for that scam and hung up and I think you should all do the same