SCAM CALL DO NOT ANSWER ANY CALLS FROM THIS NUMBER!!! The message left on my machine was that they were calling about was the IRS was suing me and to call back IMMEDIATELY to 646-357-1811 again call 646-357-1811.
This is a total phishing scam to clean you out. If you get any call like this report it to treasury.gov/tigta/ you need to give some personal information to them on the sire but it is the only way to put a stop to these people who knows where they are calling from but your credit card or bank account could be hacked because they will want to charge you to stop the lawsuit.
THIS HAS BEEN GOING ON FOR SEVERAL YEARS AND IF EVEN IF ONE NUMBER GETS SHUT DOWN it could save hundreds of unsuspecting people lots of money.