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.
I also received a call from this number with the message that the IRS is filing a lawsuit against you. I immediately thought that it was a scam. The IRS wouldn't leave such a message. I called the number just to see what they would say but no one answered. If the person that is trying to scam people would use his brain for good instead of evil, can you imagine how much good he could do in this world? What a waste!