I called this number back today and it was a billing agency for a small hospital bill that I legitimately owed so it was a valid reason that they called. I paid the bill after verifying everything to my satisfaction.

they call me every day. i just dont receive it because its an unknown no.

11-25-09 2:10pm.
Same number. No message left. Called back and the message this time was "All of our agents are busy. Please hold for the next available agent". No mention of what company this is.

Called during day to a cell phone I leave at my house for emergencies (nobody is supposed to have this number). No message left. Called the number back, and just got a message "nobody is here to take your call. please leave a message and someone will return your call".

I haven't answered the call because it is unknown to me but they are calling my cell phone number.