Who called from 2819680179

Received a call to my cell phone on May 4, 2016at 8:45PM from (281) 968-0179, Alvin, TX. Didn't pick up since I don't know anyone in that area.

Received cell call on 5/12 from 281-968-0179. Did not answer, no message left

Got a call from this number and when I picked up, they said nothing and hung up after a few seconds.

My experience from this number (from Alvin) on May 4 is exactly like Phil above.  I also had a call from a similar number (281-968-0211 also from Alvin) on May 11 which had the same result.

I picked up and it said "Congratulations! You have won a free cruise to the Bahamas!" I hung up