Scam voicemail from computer-generated female voice. Caller ID read CELL PHONE. Voicemail: "Internal Revenue Services. The reason of this call is to inform you that IRS is filing law suit against you. To get more information about this case file please call immediately on our department number 470-494-9149. I repeat 470-494-9149. Thank you".
Reported to https://www.treasury.gov/tigta/contact_report_scam.shtml