I have had the exact same thing happen today the first was from the DC number202-697-9381and then just now the TX stupid scammers I will never call them back but it's just sad that people do call them back.
Same thing. Got two calls claiming I was being sued by IRS and needed to call back immediately. First call was on Nov 12 from 360-342-2990 Battle Ground, WA. Second call was today Nov 16 from 346-971-6256 Houston, TX.