Who called from 2108921790

I answered and it was a recording saying I won a free cruise to the Bahamas. I hung up

Just got this call from this number in San Antonio? They didn't leave a msg. If they are not in my phone list or don't leave a msg...they automatically go in my blocked caller list!

No message

2108921790                          Called my , left no message...................

Cell phone rang twice and stupid me answered it. Caller hung up. Must be a robo number looking for active lines. Now blocked, but they will get through again.