Do yourself a favor and block this number. I called and the guy told me he is William Wolter - he is a middle eastern gentlemen, gave me employee # 4529 and "badge" PL9572. They are a scam. They will try to extort money from you if you let them. I called the IRS, and while holding, I heard this message "Be aware of fraudulent calls from people trying to represent themselves as IRS agents. The IRS will NEVER call you and demand immediate payment over the phone, without at least having sent you a notice first." They will scam you - please don't be scammed!
Recorded message called with this Arlington VA phone number saying it was an investigator for tax evasion and I had better call them back or they were going to the police. Since I knew that would not pertain to me and it was a autobot call (no caller on the line) it had to be fraud.