Who called from 3104094056

I got a call this morning from this number 310-409-4056 and picked up and say hello but no response. Actually, they called my phone so many time already.  is there anyway we can find out who this call is?

Called, left no message...

same here, called and no message. who are they? and what they want?

I just got a call from them, and they said something about my number had been selected and press 1 for my promotional prize.

Same here: promo call about a free prize.
Area code is Santa Monica CA