Who called from 6036643775

Got a call from this number today, Wednesday 4/30/14, at 5:55 p.m.  I NEVER answer calls from numbers I don't recognize, and they didn't leave a message.  The default on my cell phone is a silent ringtone (people I actually KNOW and want to talk to have their own ringtones), so I don't even notice these until I go get my phone to make a call.

No idea who this is ???  Called left no message.

They keep calling, I keep ignoring.  A**holes.

Just called me, caller id says SSI. I didn't pick up.

Survey company AKA telemarketer