This is a "call back" number for an IRS scam.

IRS fraud for SURE

caller said a notice against my name and SSN with a non available tax warrant would be filed agents you in the federal court house if I did not call back

Received the same call today....really..

I have received at least three calls from "agents' or "officers" claiming that a tax evasion or tax fraud lawsuit has been submitted under my SSN#.  To avoid arrest, I am to return the call to (703) 542-9014.  Caller ID gives this number:  (703) 756-6663, which "coincidentally" is an answering service claiming it's the IRS.  While I can handle these types of calls, my fear is that elderly people, such as my mother, will buy into it and give information to people trying to scam them.