Just got the call from this number about 5 mins ago. They leave a message stating that "The IRS is filing a lawsuit against you. Please call back this number for more info." Bull to the highest degree. I wonder how many people are getting scared into calling back this scam. I take care of an elderly relative and I screen all calls. If I didn't, crap like this would cause a lot of needless worry. Just block the call if you can. It's a scam to scare you into giving up your information by returning the call and confirming that the phishing job worked.
They called 3 times about 3 1/2 - 4 hours apart and left same message everyone else got. Startled me at first, then googled, found this website and feel a lot better!
This scam continues. I received the same call three times at roughly hour-long intervals, supposedly from the "IRS," saying it was my last chance to respond to a lawsuit being filed. I'm pretty sure the IRS has my address if they want to get in touch. 'Grateful to have my suspicions confirmed. Thanks everyone!