Who are they?

This number came across my cell at 4:10pm Jan 3rd...Ended up being a missed call because I wouldn't answer it. No voicemail left. I tried to call back but a "fast" busy signal greets you when the call is answered.

I've been getting calls on my cell phone from strange numbers that I have no connection to. The first call was on 1/3/12 at 10:36am from 206 629-8522 and the latest call came in on 1/3/12 at 337pm from 404 567-7296. Please assist me in blocking these unsolicited annoying calls being received on my cell phone. I've signed up with the "Do Not Call" list on numerous occasions.  Please help!!

i got a call from this number jan 3 and my sister in law anserd it they asked for me when she said who is this he hung up.

call every morning and do not leave a voice mail