THEY CALL AND SAY NOTHING AND HANG UP . MOST LIKELY WANTING A CALL BACK.

Caller ID: Washington DC
Message: None

Wonder who this is?

You are in line to get a call from India scammers trying to convince they are the IRS and you owe them or the same attempting to convince you they are Microsoft and you have Viruses or the same folks telling you have been awarded a large Grant for being a good citizen and last and perhaps worst of all.......A Political Call!!!!!
Up on your toes, be ready and give-em-hell as Truman would do.

The IRS NEVER calls or emails.  They send letters only, so you can cross that off your list.

Maybe it's the President calling to confirm you supported his change by signing up for his ACA program.