Who called from 3603018913

Several calls that come in as Washington.

I received a call from 3603018913 at 8:25am PST today. No person on other end, no voicemail. I'm on the DNC list as well. Extremely annoying.

They are calling my business line which is unacceptable. They don't leave a message and it rings busy when I try and call it back.

Recieved call from this number when I answered it there was slience and then someone hung up.

I made the mistake of entering some information on-line in November, and before I even finished the form and selected the agencies to whom I was interested in talking, I was receiving phone calls.  Including this one. 38 numbers, 44 calls, and counting. This one did not leave a message