Who called from 7873335555

Got the following message from this number..."$25,000 cash dream giveaway.  We just need to verify you information.  Give us a call toll free at 1-844-604-0006."  Funny, I don't remember entering a giveaway.

did not answer as unknown # to me . CId said Arecibo Pr ? left no message - go figure . Waste Of time scam - Area code out of counry (red Flag).

same thing, 3rd call this morning.  No one on other end.

called today 2/24/2015 - did not answer and had voicemail turned off

No one on the other end.   When answered.