Who called from 4055552604

This call came in to my cell phone at 6 pm.  I said hello several times.  I could hear someone was on the line but, they did not speak.  I asked is anyone there? CLICK (loud hang up)

I too got this phone call no one answered and there was high pitched beep but I thought 555 numbers were reserved for SBC

I too am getting this call and thought 555 was SBC only, they asked for me, but not by my full name which means they got my information off something I registered for, I have found that since registering for reunion.com my junk email and my junk phone calls are about three times what they were before,