I've received three calls this week as well. Today I finally answered and they said "sorry wrong number" and quickly hung up. After reading these posts, I am a little creeped out about what is going on.
This number has called me 8 times in the last 2 days. I did answer and the lady asked who it was in Spanish im like well who's this then she hung up. Then called again I answered and said my daughter is trying to go to sleep stop calling. Then 2 more times. This morning twice with no voicemail. I dont know what's going on but it's pissing me off!