Who called from 3186361231

Got 2 calls from this number in the past 2 days. No message left and no info on caller id...

I got the same thing.  Just got a brand new cell phone two weeks ago, only a handful of people have the number.

called 4 times in 2 days. first 3 times no one on line. last time identified self as healthcare professionals against insurance reform.
we are on do not call list.

Called and left no message
I too am on a 'no call list'