Who called from 2093205493

Two missed calls from this number on my cell phone (this number did not leave a voicemail).  Really annoying to get during work when I don't know who this is.  I didn't pick up or bother to call back because I didn't identify the number.

Just rec'vd a call from this number at work. Answered it, but whoever it was hung up immediately. No clue. Looked it up and its a land line from Stockton, CA. But thats all I know.

Did not recognize this number either, but they did not leave a voice mail nor did I return the call.  Only the 209-320-5493 number apperared.

I just got called from this number. I didn't answer. I'm in Dallas, TX.

Im in dallas tx as well, just called me while I was with clients at lunch. Its an automated "spam" type of dialing.  Very illegal. Who do we report this too?