Called 3 times in a row. left no message. Did not answer.

952-314-1908 went directly to my Ooma voice mail since Minnesota area codes are on my block list.  They did leave a message that the IRS is trying to track me down.  Guess I'll have to buy a green dot card and let them scam me for thousands of $.  Oh, wait, perhaps I don't really need to let them suck my credit cards dry after all.  But someone will fork over cash to these Middle Eastern scammers.

Ok, on a more serious note:  I went to the Level 3 site (the provider for 952-314) and sent them the following:
Good Morning,
I am receiving harassing scam calls from a number on your network: 952-314-1908
The caller claims to be with the IRS and will be filing a lawsuit, etc., etc.
Kindly take the necessary steps to disconnect this phone.
Thank you,
Alan xxxxxx

Now that Level 3 has been notified of illegal activity on their network they might have an obligation to take some action.
We shall see...